Question

What volume of water is to be added to 100cm3 of 0.5M Naoh solution to make it 0.1M solution

Answer 1

Answer:

500ml

Explanation: Vol. of NaOH solution = 10⁻³ × 10²    (as 1cm³ = 10⁻³ l)

Molarity(M)  = No of moles

                Vol of solution

No of moles = M/ Vol of solution

                     = 0.5 × 10⁻¹

                     = 5 × 10⁻¹ × 10⁻¹

                     = 5 × 10⁻² mol

For 0.1 M of NaOH solution

                   0.1 = 5 × 10⁻² / Vol of solution

Vol of solution = 5 × 10⁻² / 10⁻¹

                         = 5 × 10⁻² × 10

                         = 5 × 10⁻¹ l

                         = 500 ml

Answer 2

Answer:

up

Explanation:

explanation in attachment ......