Question

How many moles of CuSO4 are used to make 250 ml of a 0.50 M CuSO4 solution? A) 0.002 mol B) 0.125 mol C) 0.319 mol D) 0.795 mol

Answer 1

Answer: 0.125moles

Explanation:

From the question above, we are only given the values of the volume and molar concentration of CuSO4 solution.

Volume of CuSO4 solution = 250mL= 250/1000L = 0.25L

Molar concentration of CuSO4 solution= 0.50M

Number of moles of CuSO4= Molar concentration of CuSO4 × volume of CuSO4

Number of moles of CuSO4= 0.50mol/dm^3 × 0.25L

Number of moles of CuSO4= 0.125moles

Therefore 0.125moles of CuSO4 are used to make 250 mL of a 0.50M CuSO4 solution.

Answer 2

Answer:

We have 0.125 moles of CuSO4 (Option B)

Explanation:

Step 1: Data given

Volume = 250 mL = 0.250 L

Molarity  CuSO4 = 0.50 M

Step 2: Calculate moles

Molarity = Number of moles / volume (in L)

Number of moles = Molarity * volume

Number of moles CuSO4 = 0.50 M * 0.250 L

Number of moles CuSO4 = 0.125 moles

We can control this by calculating the molarity:

0.125 moles / 0.250 L = 0.50 M

We have 0.125 moles of CuSO4 (Option B)