Question

calculate the amount of each stock reagent needed to a. prepare 50 mL of .80 M NaCl from 4.0 M NaCl stock. b.a. prepare 50 mL of .10 M NaCl from 4.0 M NaCl stock. c. prepare 50 mL of .30 M NaOH from 6.0 M NaOH stock. d.c. prepare 50 mL of .60 M NaOH from 4.0 M NaOH stock.

Answer 1

a) M1V1 = M2V2

0.80 * 50 = 4.0 * V2

V2 = 10 mL

Therefore,the amount of stock solution required to prepare 50 mL of 0.80M NaCl is 10.0 mL

b)

M1V1 = M2V2

0.10 * 50 = 4.0 * V2

V2 = 1.25 mL

Therefore,the amount of stock solution required to prepare 50 mL of 0.10M NaCl is 1.25 mL

c)

M1V1 = M2V2

0.30 * 50 = 6.0 * V2

V2 = 2.5 mL

Therefore,the amount of stock solution required to prepare 50 mL of 0.30M NaOH is 2.5 mL

d)

M1V1 = M2V2

0.60 * 50 = 4.0 * V2

V2 = 7.5 mL

Therefore,the amount of stock solution required to prepare 50 mL of 0.60M NaOH is 7.5 mL