Question

Calculate the number of grams of CuSO4 found in 3.29 mL of a 4.00 M CuSO4 solution. ______ grams CuSO4

Answer 1

2.08g

Step-by-step explanation:

Given parameters:

Volume of CuSO₄ = 3.29mL

Molarity = 4M

Unknown:

Mass of CuSO₄ = ?

Solution:

Let us find the number of moles from the given parameters first;

Number of moles = molarity x volume

1000mL = 1L

Express the volume of the given CuSO₄ in L = 3.29 x 10⁻³L

Number of moles = 4 x 3.29 x 10⁻³ = 0.013mol

So;

Mass of CuSO₄ = number of moles x molar mass

Molar mass of CuSO₄ = 63.6 + 32 + 4(16) = 159.6g/mol

Mass of CuSO₄ = 0.013mol x 159.6g/mol

Mass of CuSO₄ = 2.08g