Answer:
Solubility product constant
Solubility
Saturated Solution
Common ion effect
Molar Solubility
Explanation:
If i have the ionic compound KNO3 for instance; the solubility product of the compound is the product of the molarities of the dissolved ions, raised to a power equal to the ion's coefficient in the balanced chemical equation.
E.g
KNO3(s) ------> K^+(aq) + NO3^-(aq)
Ksp = [K^+] [NO3^-]
The solubility of any given substance is defined as mass of the substance in grams that dissolves in 100 mL of water.
A saturated solution is one that has dissolved the maximum amount of solute at a given temperature. If more solute is added, it will not dissolve.
If i add AgCl to a solution of HCl, the solubility of AgCl in HCl solution is found to be less than its solubility in pure water because of the presence of a common Cl^-. Hence, common ion effect is a decrease in the solubility of an ionic compound as a result of the addition of a common ion to the solution.
The molar solubility of a substance is defined as the maximum number of moles of a substance that will dissolve in 1 L of solution.
The terms used to describe the followings are:
Solubility product constantSolubilitySaturated SolutionCommon ion effectMolar SolubilityWhat is molarity?
The molarity is the concentration unit used for the determination of the moles of solute in the liter of solution.
The product of the concentration of the ions raised to the stoichiometric coefficient gives the solubility product constant for the compound.For example:
[tex]\rm H_2A\;\rightarrow\;2H^+\;+A^-\\Solubility\;product\;constant=[H^+]^2[A^-][/tex]
The solubility can be defined as the mass of the salt that can be dissolved in 100 mL of water.The solution with the maximum amount of salt dissolved at a certain temperature is termed the saturated solution. Further addition of the solute results in the precipitation of the solute in the solution.
The addition of the compounds with the common ion as the salt results in an increased concentration of the salts in the solution and the solubility will be decreased.The effect raised with the addition of the common ions is termed the common ion effect.
The molar solubility is the maximum moles of the salt that can be dissolved in the liter of the solution.Learn more about molarity, here:
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a sample of oxygen has its absolute temperature halved while the pressure of the has remained constant. if the initial volume is 400ml, what is the final volume?
Answer: 200mL
Explanation:
Determine the empirical formula for dioxin (C12H4C14O2)
The empirical formula for dioxin (C₁₂H₄Cl₄O₂) is (C₆H₂Cl₂O).
We can determine the components of a chemical compound by looking at its formula. We can determine the precise number of atoms in a compound's molecule using its molecular formula. The ratio of these components is provided by the empirical formula. It is the compound's molecular formula scaled down to its lowest integer ratio.
Empirical formula for dioxin (C₁₂H₄Cl₄O₂) is (C₆H₂Cl₂O).
To determine the emperical formula:
Step1: Determine the masses.
Step 2: Multiply the grams by the atomic mass to get the number of moles.
Step 3: Subtract the least number of moles from the total number of moles of each element.
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In which direction does the wind blow from during a sea breeze
Answer:
Sea breeze moves from the areas of higher pressure on the water in the direction of the areas of lower pressure on land.
Explanation:
Sea breeze moves from the areas of higher pressure on the water in the direction of the areas of lower pressure on land. Whereas, land breeze blows from the areas of higher pressure on land to the areas of lower pressure on water.
An ideal gas is contained in a closed assembly with an initial pressure and
temperature of 250 kN/m²and 75°C respectively, If the final volume of the system
is increased 1.8 times and the temperature drops to 18°C, determine the final
pressure of the gas.
Answer: The final pressure is 116kPa or [tex]116kN/m^2[/tex]
Explanation:
The combined gas equation is,
[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = [tex]250kN/m^2=250kPa[/tex] [tex](1kN/m^2=1kPa)[/tex]
[tex]P_2[/tex] = final pressure of gas = ?
[tex]V_1[/tex] = initial volume of gas = v ml
[tex]V_2[/tex] = final volume of gas = [tex]1.8\times v=1.8vml[/tex]
[tex]T_1[/tex] = initial temperature of gas = [tex]75^0C=(75+273)K=348K[/tex]
[tex]T_2[/tex] = final temperature of gas = [tex]18^0C=(18+273)K=291K[/tex]
Now put all the given values in the above equation, we get:
[tex]\frac{250kPa\times v}{348}=\frac{P_2\times 1.8v}{291}[/tex]
[tex]P_2=116kPa[/tex]
The final pressure is 116kPa or [tex]116kN/m^2[/tex]
A 7.00 g sample of NaCl was dissolved in enough water to give 250 mL solution.
What is the molarity of the solution?
Answer: The molarity of given solution is 0.476 M.
Explanation:
Given : mass of sample (solute) = 7.0 g
Volume of solution (solvent) = 250 mL
Convert mL into L as follows.
[tex]1 mL = 0.001 L\\ 250 mL = 250 mL \times \frac{0.001 L}{1 mL}\\= 0.25 L[/tex]
Molar mass of NaCl is 58.44 g/mol. Hence, moles of NaCl are calculated as follows.
[tex]No. of moles = \frac{mass}{molar mass}\\= \frac{7.00 g}{58.44 g/mol}\\= 0.119 mol[/tex]
Molarity is the number of moles of a substance present in one liter of solution or solvent.
So, molarity of given solution is calculated as follows.
[tex]Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.119 mol}{0.25 L}\\= 0.476 M[/tex]
Thus, we can conclude that molarity of given solution is 0.476 M.
What volume would 9.23 moles of oxygen gas occupy at 825 mmHg and 45 C
Answer:
Explain:- 22.4L Imol Page 10 Many gas law problems involve calculating the volume of a gas produced by the reaction of volumes of other gases. The problem solving strategy that we have used throughout your chemistry course is still the same. 10.
The volume would 9.23 moles of oxygen gas occupy at 825 mmHg and 45 C 22.4L.
What is an ideal gas law ?According to the Ideal Gas Law, all gases contain the same number of molecules at the same temperature, pressure, and volume (but not the same mass).
When the temperature and pressure are close to the point of transforming into a liquid or solid, the Ideal Gas law does not apply.
There are four governing assumptions for a gas to be "ideal": The volume of the gas particles is insignificant. The gas particles are all the same size and have no intermolecular forces with one another. According to Newton's Laws of Motion, the gas particles move at random.
Given :
Volume = ?
Number of moles = 9.23 moles
Temperature = 318K
Pressure = 825 mmHg = 1.08 atm
By an ideal gas equation
PV = nRT
V = nRT/ P
= 9.23 × 0.0821 × 318 / 1.08
= 22.4L
Thus, The volume would 9.23 moles of oxygen gas occupy at 825 mmHg and 45 C is 22.4L.
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What do you do while drawing a conclusion?
O A. Find a connection between variables
O B. Make a hypothesis
O C. Record observations
D. Make up new data if you need to
Answer:
A. Find a connection between variables
Explanation:
In the scientific method, the first step is to make an observation. To observe means to carefully monitor phenomena with a view to draw general patterns from specific occurrences.
The second step is to draw up a hypothesis; this is a tentative explanation for the observation.
The next step is to perform an experiment to determine the effect of change in one more variables on another variable. The experiment will confirm or disprove the hypothesis.
The last step is to draw a conclusion. In drawing up a conclusion, a scientist finally establishes the relationship between two variables and finds the connection between them.
why does oxygen and carbon dioxide travel within the seed and the egg
Give the formulas for the following
Lithium oxide
Iron(III) nitrate
Aluminum oxide
Copper (II) chloride
Zinc (II) sulfate
Li2O
Fe(NO3)3
Al2O3
CuCl2
ZnSO4
All you have to do here is make sure your charges are balanced when you write the compound. For example, Iron (III) has a +3 charge, and nitrate has a -1 charge. You need 3 nitrates to match that charge, hence Fe(NO3)3.
What is the mean of magnetic susceptibilty?
Answer:
Magnetic susceptibility is the degree to which a material can be magnetized in an external magnetic field. If the ratio between the induced magnetization and the inducing field is expressed per unit volume, volume susceptibility (k) is defined as.
Explanation:
good luck
If a rigid can of volume 10.0 L starts at a temperature of 27 oC and 800.0 torr and is heated to 327 oC, what is the new pressure in torr?
Answer: The final pressure is 1600 torr.
Explanation:
To calculate the final pressure of the system, we use the equation given by Gay Lussac' Law. This law states that pressure of the gas is directly proportional to the temperature of the gas at constant volume.
Mathematically,
[tex]\frac{P_1}{T_1}=\frac{P_2}{T_2}[/tex]
where,
[tex]P_1\text{ and }T_1[/tex] are the initial pressure and temperature of the gas.
[tex]P_2\text{ and }T_2[/tex] are the final pressure and temperature of the gas.
We are given:
[tex]P_1=800.0torr\\T_1=27^oC=(27+273)K=300K\\P_2=?\\T_2=327^0C=(327+273)K=600K[/tex]
Putting values in above equation, we get:
[tex]\frac{800.0torr}{300K}=\frac{P_2}{600K}\\\\P_2=1600torr[/tex]
Thus the final pressure is 1600 torr.
Think of the different types of reactions you have learned about. How can you tell if they absorb energy or release energy, and at the molecular level, how are they different?
Answer:
? more info
Explanation:
Give users an example of the reactions you've learned about so we can have more of an idea. I'd be glad to help, if you edited your answer, meanwhile I too have homework in need of finishing.
What is the percent by mass of water in the hydrate Na2CO3.10H20 (formula mass = 286)?
Calculation: Molar mass of water = 180 % of water = > 180/286*100 = > 62.93%.
Answer: the percent by mass of water in the hydrate Na2CO3.10H20 is 62.93%.
Which describes how technology has changed society?
A. There is less food available to people.
B. People live longer than they used to
O C. It is more difficult to move goods
O d. It is hard for people to communicate
Answer:
B. People live longer than they used to
Explanation:
None of the other answers are correct.
HNO3 + Sn + H2O → H2SnO3 + NO
By algebraic method pls
Answer:
3Sn + 4HNO3 + H2O → 3H2SnO3 + 4NO
Please help for brainliest
Don’t skip and don’t answer if u don’t know.
Answer:
burning wood be a chemical change because it wouldn’t be able to go back to its original form. A physical change would be a broken pencil. The pencil is still a pencil, it’s just a physical change.But if it were burned it would be a chemical change.
Explanation:
help. no scam links or blocked.
Explanation:
This is cause of b) Static Electricity
It is also called Electrostatic force combined together.
Hope it helps ya :)
If 1.8 moles of sodium are present, how many moles of zinc are produced?
Answer:
0.9moles of Zn are produced
Explanation:
Based on the reaction:
ZnO + 2Na → Na2O + Zn
1 mole of ZnO reacts with 2 moles of Na to produce 1 mole of Na2O and 1 mole of Zn
For 2 moles of sodium present, 1 mole of Zn is produced (The conversion factor is 2mol Na = 1mol Zn
If 1.8 moles of sodium are present:
1.8mol Na * (1mol Zn / 2mol Na) =
0.9moles of Zn are produced
2. Which of the following is NOT a function of the saliva?
A. aids in swallowing
B. partially digests starch
C. produces bile
D. softens the food
Explanation:
c . produces bile is not the function of slaiva
Answer:
B. partially digests starch
A reaction has activation energy of 85kjper mol. What is the effect on the rate of raising the temperature from 20degree to 30 degree
Answer: The rate increases 3 times on raising the temperature from 20degree to 30 degree
Explanation:
According to Arrhenius equation with change in temperature, the formula is as follows.
[tex]ln \frac{k_{2}}{k_{1}} = \frac{-E_{a}}{R}[\frac{1}{T_{2}} - \frac{1}{T_{1}}][/tex]
where [tex]k_2[/tex] = rate constant at temp [tex]T_2[/tex]
[tex]k_1[/tex] = rate constant at temp [tex]T_1[/tex]
[tex]E_a[/tex]= activation energy
R= gas constant
[tex]T_1[/tex]= temperature = [tex]20^0C=(20+273)K=293K[/tex]
[tex]T_2[/tex]= temperature = [tex]30^0C=(30+273)K=303K[/tex]
[tex]ln \frac{k_{2}}{k_{1}} = \frac{-85\times 1000J/mol}{8.314J/Kmol}[\frac{1}{303} - \frac{1}{293}][/tex]
[tex]ln \frac{k_{2}}{k_{1}}=1.15[/tex]
[tex]\frac{k_{2}}{k_{1}}=3[/tex]
Thus rate increases 3 times on raising the temperature from 20degree to 30 degree
r.
25. An organic compound (A) C3H5N, undergoes reduction with
LiAlHe to give (B), CzHgN. Compound (B) reacts with
chloroform and KOH to give an unpleasant smell. Compound
(B) reacts with sodium nitrite and hydrochloric acid to give
(C), C3H80, which on treatment with conc. H2SOа acid gives
(D) C3H6. (D) on reaction with conc. H2SO4 and subsequent
hydrolysis yield an isomer of (C). Identify A, B, C, D with
proper explanation and chemical reactions.
frivolont metal was
Answer:
A - Nitrile compound
B- AlkylAmine
C- Alcohol
D - Alkene
Explanation:
(A) undergoes reduction to form alkylamine.
(B) is a primary alkyl amine which on carbylamine test gives a foul smell.
(B) reacts with NaNO2 + HCl undergoes diasotisation following which alcohol is produced.
(C) being a alcohol undergoes hydrolysis to give alkene.
(D) On further reaction with H2S04 by the rule of Markownikoff rule it forms a isomer of (C).
How many moles are in 8.7 x 104 atoms of oxygen?
The hybridization of orbitals on the central atom in a molecule is sp. The electron-domain geometry around this central atom is ________. The hybridization of orbitals on the central atom in a molecule is sp. The electron-domain geometry around this central atom is ________. trigonal bipyramidal octahedral trigonal planar tetrahedral linear
Answer:The electron-domain geometry around this central atom is linear
Explanation:
The hybridization is sp which means the number of electron pairs involved are 2. The electron domain geometry will have two sigma bonds and thus geometry will be linear.
The electron domain geometry will be Trigonal bipyramidal when hybridization is [tex]sp^3d[/tex]
The electron domain geometry will be octahedral when hybridization is [tex]sp^3d^2[/tex]
The electron domain geometry will be Trigonal planar when hybridization is [tex]sp^2[/tex]
The electron domain geometry will be tetrahedral when hybridization is [tex]sp^3[/tex]
ASAP PLS
A 18.7 g piece of aluminum (which has a heat capacity of 0.89 JPC-g) is
heated to 82.4°C and dropped into a calorimeter containing water
(specific heat capacity of water is 4.18 J/gºC) initially at 22.3°C. The final
temperature of the water is 24.3°C. Ignoring significant figures, calculate
the mass of water in the calorimeter. *
Answer:
think I did this before and its V
Describe two signs that show that a chemical reaction happens when magnesium
burns in air.
Answer:
When magnesium burns in air, the oxygen in the air reacts with magnesium metal to produce magnesium oxide.
Magnesium burns in oxygen present in the air to produce magnesium.
A car is traveling at 20 meters/second and is brought to rest by applying brakes over a period of 4 seconds.What is its average acceleration over this time interval?
Answer: Its acceleration is -5 meters/second2.
Explanation:
an acid based titration was performed. it took 27.45 mL of the base, KOH, to titrate 3.115 g HBr, the acid. what was the molarity of KOH?
Answer:
1.4 M
Explanation:
n(HBr)=3.115/81
so, 3.115/81=0.0385mol
according to the reaction, n(HBr)=n(KOH)=0.038 mol
C(KOH)=n/V=0.0385/0.02745
0.0385/0.02745 =1.4 M
in short the answer is 1.4 M (molarity)
how many oxygen molecules in 2.3x10-⁸g of molecular oxygen
Answer:
6.321 × 10^22
Explanation:
Mass of Oxygen =
3.36
g
Molar mass of oxygen (
O
2
) = 16 x 2 =
32
g
m
o
l
−
Total molecules in oxygen = Mass in grams/Molar mass x
N
A
=
3.36
32
x
6.02
x
10
23
=
6.321
x
10
22
Note:
N
A
(Avagadro's number) =
6.02
x
10
23
Hope it helps...
Whats the name?!?!?!??!?!?!?!?!?!?!!?!?!?!??!?!?!?!
explain hydrophobic and hydrophylic
Answer:
hydrophobic: tending to repel or fail to mix with water.
hydrophylic: having a tendency to mix with, dissolve in, or be wetted by water.
Hope it helps!!!