# Chemistry :/

Experiment 1 results:
mass of crucible 88g
mass of hydrate 93g
mass of salt 91.196g

1. Calculate the following:
a:mass of water in the hydrate sample (g)
b:number of moles of water in the sample
c:mass of pure salt in the sample (g)
d:number of moles of salt in the sample
e:molar ratio of water to salt in the sample
2. From your calculations, what is the empirical formula of copper sulfate hydrate?
3.4. Write the equation for the decomposition of the hydrate, CuSO4*XH2O.

Experiment 2 results:
mass of crucible: 88g
mass of hydrate and crucible: 93g
mass of salt:90.342

1. Calculate the following:
a:mass of water in the hydrate sample (g)
b:number of moles of water in the sample
c:mass of pure salt in the sample (g)
d:number of moles of salt in the sample
e:molar ratio of water to salt in the sample

2.From your calculations, what is the empirical formula of magnesium chloride hydrate?

3.Write the equation for the decomposition of the hydrate, MgCl2*XH2O.

1. 👍 0
2. 👎 0
3. 👁 1,174
1. These are the calculations I can up with for experiment 1:

a:mass of water in the hydrate sample (g) 1.804g
b:number of moles of water in the sample 0.100g
c:mass of pure salt in the sample (g) 3.196g
d:number of moles of salt in the sample .0214g
e:molar ratio of water to salt in the sample 4.673g

For Experiment 2:
a:mass of water in the hydrate sample (g) 2.658g
b:number of moles of water in the sample 0.148g
c:mass of pure salt in the sample (g) 2.342g
d:number of moles of salt in the sample 0.016g
e:molar ratio of water to salt in the sample 9.25g

I really just need it checked and help with the formulas please!

1. 👍 0
2. 👎 0
2. Formulas for experiment 1:
CuSO4*5H2O
CuSO4.XH2O --------> CuSO4 + XH2O

Formulas for experiment 2:
MgCl2·6H2O
MgCl2 * X H2O = MgCl2 + X H2O

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Chemistry

After 0.6523 g of CoCl2*6H2O is heated, the residue has a mass of 0.3423 g. Calculate the % H20 in the hydrate. What is the formula of the hydrate? -I understand how to get the % H2O in the experiment but how do you determine the

2. ### chemistry

a hydrated salt is a solid that includes water molecules within its crystal structure. a student heated a 9.10-gram sample of a hydrated salt to a constant mass of 5.41 grams. what percent by mass of water did the salt contain?

3. ### Chemistry

A sealed flask contains 1 mole of hydrogen and 3 moles of helium gas at 20DC. If the total pressure is 40kPa, what is the partial pressure of the Hydrogen gas? AND :) The data below was obtained by a student in order to determine

4. ### Chem

what mass of NaCl is contained in 24.88g of a 15% by mass solution of NaCl in water?

1. ### Chemistry

What is the variable x in the following hydrate formula NaCl xH2O if the mass of sodium chloride is 58g and the mass of the water is 36g

2. ### Chemistry

A hydrate of copper (II) sulfate with formula CuSO4.xH2O has a molar mass of 250.0 g/mol. 2.545 g of hydrate is heated and 63.85% of the residue is found after heating. a) Determine the value of x in the formula of the compound b)

3. ### chemistry

mass of crucible- 26.4574g mass of crucible and hydrated sample- 27.7617g mass of hydrated sample 1.3043g mass of crucible and dehydrated sample- 27.5693g mass of dehydrated sample- 1.1119g mass of filter paper- 0.7089g mass of

4. ### chemistry

FORMULA OF A HYDRATE Some salts, when crystallized from water solutions, retain definite proportions of water as an integral part of the crystal structure. This type of crystal is called a hydrate. In this experiment, you will

1. ### Chemistry

I am doing a lab online and have no clue on how to get started with the following questions? Please Help me! 1. Calculate and record the following (in grams): (a) mass of NaCl by subtraction of other components: (b) measured mass

2. ### Chemistry

1. What is the percent by mass of a solution that contains 50 grams of solute dissolved in 200 grams of solution? What is the concentration of the same solution in parts per million? 2. What is the percent mass of a solution that

3. ### chemistry

A 2.50 g sample of a hydrate of calcium sulphate losses 0.523 g of water when heated. Determine the mass percent of water in the hydrate and the formula of the hydrate.

4. ### Chemistry

A hydrate of zinc nitrate has the formula Zn(NO3)2 . xH2O. If the mass of 1 mol of anhydrous zinc nitrate is 63.67% of the mass of 1 mol of the hydrate, what is the value of x?