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