Question

What will the volume of a 0.5 M solution be if it contains 25 grams of calcium hydroxide?

Answer 1

Answer:

m=25g

M.M. of Ca(OH)₂ is 74g

Molarity, M=0.5mol/L

As, M=[m]÷[V(L)×M.M.]

Thus,

V=m÷(M.M.×M)

V=25÷(74×0.5)

V=25÷37

V≈0.676L or 676mL

Answer 2

Answer:

674.83 mL

Explanation:

Given :

Molarity = 0.5 M

Given mass = 25 g

We have molar mass of Ca ( OH )₂ = 74.093 g / mol

We know :

Molarity = Given mass / ( Volume ( mL ) × Molar mass ) × 1000

Volume = Given mass / ( Molarity × Molar mass ) × 1000

Putting values here we get :

= > V = ( 25 × 1000 ) / ( 74.093 × 0.5 ) mL

= > V = 25000 / 37.046 mL

= > V = 674.83 mL

Hence we get required answer.