In an experiment a student prepared a sample solution by mixing HCl20.00mLAcetic Acid10.00mLEthanol5.00mLEthyl Acetate15.00mL If the...

Question

Question

In an experiment a student prepared a sample solution by mixing

HCl20.00mLAcetic Acid10.00mLEthanol5.00mLEthyl Acetate15.00mL

If the Molarity of HCl is 3.557 and the Density is 1.062, calculate the inital mols of water in the flask.

science chemistry

Answer 1

Answer #1

Molarity of HCl = 3.557 M

Volume of HCl = 20 ml or 0.020 L

Moles of HCl = 3.557 M * 0.020 L = 0.071 mol

Mass of HCl = 0.071 mol * 36.5 g/mol

= 2.59 g

Now, density of solution = 1.062 g/ml

So, mass of solution = 20 ml * (1.062 g/ml)

= 21.24 g

Now mass of water = mass of solution - mass of HCl

= 21.24 g - 2.591 g

= 18.65 g

Moles of water = 18.65 g / (18.00 g/mol )

= 1.036 mol

Answer 2

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