use dilution formula
M1*V1 = M2*V2
1---> is for stock solution
2---> is for diluted solution
Given:
M1 = 0.1 M
V1 = 10 mL
V2 = 1000 mL + 10 mL = 1010 mL
use:
M1*V1 = M2*V2
M2 = (M1*V1)/V2
M2 = (0.1*10)/1010
M2 = 9.90*10^-4 M
use:
pH = -log [H+]
= -log (9.9*10^-4)
= 3.0044
Answer: 3.00
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