Question

To understand how to prepare a dilute solution and determine the concentration or volume of the initial or dilute solution. what is the final volume in milliters when 0.644 L of a 31.5% (m/v) solution is diluted to 248% (m/v)? Express your answer with the appropriate units. A 510 mL NaCI solution is diluted to a volume of 1, 34 L and a concentration of 6.00 M. What was the initial confrontation? Express your answer with the appropriate units.

Answer 1

Part B

Use the formula C₁V₁ =C₂V₂

Where, C₁ = initial concentration = 31.5 %

V₁ = initial volume = 0.644 L = 644 ml

C₂ = final concentration = 24.8 %

V₂ = final volume = ?

C₁V₁ =C₂V₂ Thus,

V₂ = C₁V₁ /C₂

Substitute value in above equation

V₂ = 31.5 $\times$ 644 / 24.8 = 818 ml

final volume = 818 ml

Part C

Use the formula C₁V₁ = C₂V₂

Where C₁ = initial concentration = ?

V₁ = initial volume = 510 ml

C₂ = final concentration = 6.00M

V₂ = final volume = 1.34 L = 1340 ml

Substitute the value in formula

C₁V₁ = C₂V₂

C₁ = C₂V₂/V₁

= 6.00 $\times$ 1340 / 510 = 15.76

C₁ = 15.76 M

initial concentration of NaCl = 15.76 M