In part B of this weeks experiment you are asked to determin

In part B of this week\'s experiment, you are asked to determine the pH of HCI with varying concentrations, i.e., 1.0M, 0.10M and 0.010M. Describe in detail how you would prepare 20mL 4. of a 0.10M solution from a 1.0M (stock) solution. Hint: Use the formula of dilution factor.

Solution

Use the formula C₁V₁ =C₂V₂

Where, C₁ = initial concentration = 1.0 M

V₁ = initial volume = ?

C₂ = final concentration = 0.1M

V₂ = final volume = 20 ml

C₁V₁ =C₂V₂ Thus

V₁ = C₂V₂ /C₁

Substitute the value in above equation

V₁ = 0.1 X 20/1 = 2 ml

take 2 ml 1.0 M sample of HCl and dilute to 20 ml we get 0.1 M 20 ml HCl solution.