Answers
Answer:
a. The limiting reactant is Ca(OH)₂
b. The theoretical yield of CaCl₂ is approximately 621.488 grams
c. The percentage yield of CaCl₂ is approximately 47.06%
Explanation:
a. The given chemical reaction is presented as follows;
Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O
Therefore;
One mole of Ca(OH)₂ reacts with two moles of HCl to produce one mole of CaCl₂ and two moles of water H₂O
The mass of HCl in an experiment, m₁ = 229.70 g
The mass of Ca(OH)₂ in an experiment, m₂ = 207.48 g
The molar mass of HCl, MM₁ = 36.458 g/mol
The molar mass of Ca(OH)₂, MM₂ =74.093 g/mol
The number of moles of HCl, present, n₁ = m₁/MM₁
∴ n₁ = m₁/MM₁ = 229.70 g/(36.458 g/mol) ≈ 6.3 moles
The number of moles of Ca(OH)₂, present, n₂ = m₂/MM₂
∴ n₂ = m₂/MM₂ = 207.48 g/(74.093 g/mol) ≈ 2.8 moles
The number of moles of Ca(OH)₂, present, n₂ = 2.8 moles
According the chemical reaction equation the number of moles of HCl the 2.8 moles of Ca(OH)₂ will react with, = 2.8 × 2 moles = 5.6 moles of HCl
Therefore, there is an excess HCl in the reaction and Ca(OH)₂ is the limiting reactant
b. According the chemical reaction equation the number of moles of CaCl₂ produced in he reaction by the 2.8 moles of Ca(OH)₂ = 2.8 × 2 moles = 5.6 moles of CaCl₂
The molar mass of CaCl₂ = 110.98 g/mol
The mass of the 5.6 moles of CaCl₂ = 5.6 moles × 110.98 g/mol ≈ 621.488 grams
The theoretical yield of CaCl₂ ≈ 621.488 grams
c. Given that the actual mass of CaCl₂ produced = 292.5 grams, we have;
The percentage yield of CaCl₂ = The actual yield/(The theoretical yield) × 100
∴ The percentage yield of CaCl₂ = (292.5 g)/(621.488 g) × 100 ≈ 47.0644646397%
The percentage yield of CaCl₂ ≈ 47.06%.
Related Questions
why are metals poor choices for coffee mugs?
Answers
Answer:
They will stay too hot.
Explanation:
You would burn yourself on the mug and your drink would be too hot to drink.
If a gas is cooled from 315K to 231K and the volume is kept constant, what would the final pressure be if the original pressure was 621 mmHg ?
Answers
Answer:
455.4 mmHg
Explanation:
To solve this problem we can use Gay Lussac's Law, which describe the temperature and pressure of a gas, at constant volume and composition:
P₁T₂ = P₂T₁In this case:
P₁ = 621 mmHgP₂ = ?T₁ = 315 KT₂ = 231 KWe input the data:
621 mmHg * 231 K = P₂ * 315 KAnd solve for P₂:
P₂ = 455.4 mmHgWhich sets of elements have similar chemical and physical properties?
1. Mg and Ra 2. Al and P 3. Be and Ba 4. Na and Cl
1 & 2 ,
2 & 3
1 & 3
2 & 4
Answers
Answer:
1 & 3
Explanation:
Elements have similar chemical and physical properties if and only if they belong to the same group of elements in the periodic table.
A group of elements in the periodic table is a family of elements, the elements in the in the same group have the same number of valence electrons in their outermost shell, share similar chemical reactivity (with slight variation within the group) and similar physical properties (with slight variation within the group).
Magnesium, radium, beryllium and barium all belong to group 2 hence they have similar chemical and physical properties.
3 Module 1 - Lessons
Dashboard
Ready
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the amount of mass in a given space
Answers
is there a relationship between CO2 levels in average global temperatures
Answers
Answer:
Yes
Explanation:
A small part of the correspondence is due to the relationship between temperature and the solubility of carbon dioxide in the surface ocean, but the majority of the correspondence is consistent with a feedback between carbon dioxide and climate.
Which solution will conduct electric current a sugar solution or a salt solution
Answers
The Plimsoll mark is placed on the side of all large commercial ships. After
reading this article and looking at the modern Plimsoll mark, why do you
think there are so many different marks for water at different levels?
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Relative formula mass of carbon manoxide
Answers
Explanation:
The relative formula mass of a substance, shown in grams, is called one mole of that substance. So one mole of carbon monoxide has a mass of 28 g, and one mole of sodium oxide has a mass of 62 g
Answer:
M(CO)=28 (g/mol)
Explanation:
M= 12+16=28 (g/mol)
How do atmospheric updrafts affect clouds?
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Answer:
Updrafts characterize a storm's early development, during which warm air rises to the level where condensation begins and precipitation starts to develop. In a mature storm, updrafts are present alongside downdrafts caused by cooling and by falling precipitation.
Hope it helps
Have a great Day : P
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Answers
Answer:
A.) Longer and Shorter
Explanation:
If the wavelength of a light wave is shorter that means the frequency will be higher.
That means that longer wavelengths have a lower frequency.
In your opinion,what will happen to a person who has sustained injury in the spinal cord?
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Answer: I think they get will paralysed and some of the impulses may not be able to get through.
Which element would have a larger
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Answers
On the Periodic Table, which elements are predominantly (mostly) gases with low densities?
Alkali Metals,
Metalloids
Transition Metals
Non-Metals
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Not sure
What is molar mass of CHI3?
Answers
Answer:
393.73 g/mol
Explanation:
brainliest? have a wonderful day
Where does uranium, the main source of nuclear power, come from?
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b.Uranium is produced continually from light energy from the Sun.
c.Uranium is produced by the compaction of animal and plant matter in the earth.
d. Uranium is produced by the conversion of precious metals into a new substance.
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Answer:
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1) We know that rtp = number of moles × 24
= 0.25 × 24
= 6 dm³
Therefore the volume of 0.25 moles of gas at rtp is A) 6 dm³
3.1) Amount of Copper = 20 tonnes
Amount of pure copper from impure copper = 18 tonnes
Purity of copper = (Pure copper/ impure copper) × 100
= (18 / 20) × 100
= 18 × 5
= 90 %
Therefore the purity of copper is 90%
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So, one mole of oxygen weighs 16 g, so 2 moles weigh 2 × 16 = 32 grams
But oxygen is diatomic so the weight is 32 × 2 = 64 grams
Therefore the weight of 2 moles of oxygen is 64 grams
3.3) Concentration of solution = Amount of solute/volume
= 4 moles/ 2 dm³
= 4 / 2
= 2 mol/dm³
Therefore the concentration of a solution containing 4 moles in 2 dm³ of solution is 2 mol/dm³
Happy to help :)
If you need any more help, fell free to ask
Extremely sorry for the late answer
What is the number of moles of H2 produced when 23 g of sodium react with water according to the equation 2Na(s) + 2H2O(l) 2NaOH(aq) + H2(g)
Answers
Answer:
0.5 mole of H₂.
Explanation:
We'll begin by calculating the number of mole in 23 g of Na. This can be obtained as follow:
Mass of Na = 23 g
Molar mass of Na = 23 g/mol
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Mole = mass / Molar mass
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Mole of Na = 1 mole
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2Na + 2H₂O —> 2NaOH + H₂
From the balanced equation above,
2 moles of Na reacted to produce 1 mole H₂.
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Show work please
Answers
Answer:
we find the mass for each element in one mole by multiplying the number of atoms in one molecule with the atomic mass
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mN=4AN=4*14=56g
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Answers
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5. Mantle
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3. Inner core
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1,crust
2, mesosphere
3,Inner core
4,Outer core
5, Mantle
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O C. They can't travel through a vacuum.
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Answers
Answer:
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Explanation:
Question 2 of 20
Based on their locations on the periodic table, which two elements would you
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A
Because Aluminum atoms tend to lose electrons in order to achieve an insert gas configuration. The aluminum atoms need to lose 3 electrons in order to attain the neon configuration , so it forms a trip of positive action
Answer:
Aluminium & Phosphorus (C & D)
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Answer:
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the balance
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it's B
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Answer: With this tool, the
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EDU 2021
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Answer:
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Explanation:
Answer:
Electrolytes are minerals in your body that have an electric charge. They are in your blood, urine, tissues, and other body fluids. Electrolytes are important because they help
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Sodium, calcium, potassium, chloride, phosphate, and magnesium are all electrolytes. You get them from the foods you eat and the fluids you drink.
The levels of electrolytes in your body can become too low or too high. This can happen when the amount of water in your body changes. The amount of water that you take in should equal the amount you lose. If something upsets this balance, you may have too little water (dehydration) or too much water (overhydration). Some medicines, vomiting, diarrhea, sweating, and liver or kidney problems can all upset your water balance.
Treatment helps you to manage the imbalance. It also involves identifying and treating what caused the imbalance.
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