a)
use dilution formula
M1*V1 = M2*V2
1---> is for stock solution
2---> is for diluted solution
Given:
M1 = 0.108 M
V1 = 28.2 mL
V2 = 28.2 mL + 49.4 mL = 77.6 mL
use:
M1*V1 = M2*V2
M2 = (M1*V1)/V2
M2 = (0.108*28.2)/77.6
M2 = 0.0392 M
Answer: 0.0392 M
b)
Given:
M1 = 0.685 M
V1 = 38.3 mL
V2 = 38.3 mL + 148 mL = 186.8 mL
use:
M1*V1 = M2*V2
M2 = (M1*V1)/V2
M2 = (0.685*38.3)/186.8
M2 = 0.1404 M
Answer: 0.140 M
c)
Given:
M1 = 32.3 M
V1 = 102 mL
V2 = 102 mL + 490 mL = 592 mL
use:
M1*V1 = M2*V2
M2 = (M1*V1)/V2
M2 = (32.3*102)/592
M2 = 5.5652 M
Answer: 5.57 M
d)
Given:
M1 = 1.87 M
V1 = 835 mL
V2 = 835 mL + 329 mL = 1164 mL
use:
M1*V1 = M2*V2
M2 = (M1*V1)/V2
M2 = (1.87*835)/1164
M2 = 1.3415 M
Answer: 1.34 M
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