Question

4. To what volume should you dilute 25 mL of a 10.0 M HCl solution to obtain a 0.250 M solution? Show your work Final Answer 5. Seawater has a concentration of 0.60 M NaCl. The acceptable amount of NaCi in drinking water is 9.0 g/L. How much pure water should be added to 2.50 L of seawater for it to be safe for human consumption? Show your work Final Answer

Answer 1

4)

use dilution formula

M1*V1 = M2*V2

1---> is for stock solution

2---> is for diluted solution

Given:

M1 = 10 M

M2 = 0.25 M

V1 = 25 mL

use:

M1*V1 = M2*V2

V2 = (M1 * V1) / M2

V2 = (10*25)/0.25

V2 = 1000 mL

Answer: 1000 mL

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