Question

What volume of water should be added to 50ml of HNO3 having density 1.5g/ml and 63% by weight to have one molar solution

Answer 1

In order to obtain a volume of 1 L, 500 mL of water must be added to the original solution of 500 L.

Explanation:

The symbol for molarity, M, pronounced molar, has the unit mol/L.

When diluting solutions, use the equation M1V1×M2V2, where M1 is the initial molarity in mol/L, M2 is the final molarity, V1 is the initial volume in Liters, and V2 is the final volume in Liters.

Known
M1=1.0 mol/L CuSO4
V1=500mL×1L1000mL=0.5 L
M2=0.5 mol/L CuSO4

Unknown
V2

Solution
Rearrange the equation to isolate V2. Substitute the known values into the equation and solve.

V2=M1V1M2

V2=1.0mol/L×0.5L0.5mol/L=1 L

In order to obtain a volume of 1 L, 500 mL of water must be added to the original solution of 500 mL.