If 100. mL of water is added to 25 mL of 5.0 M NaCl, the final concentration is ________. (Assume volumes are additive.)
A)1.0 M
B)1.3 M
C)25 M
D)2.0 M
E)5.0 M

Name: If 100. mL of water is added to 25 mL of 5.0 M NaCl, the final concentration is ________. (Assume volumes are additive.) A)1.0 M B)1.3 M C)25 M D)2.0 M E)5.0 M
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Question

Quizplus · Accepted Answer

The initial amount of NaCl is 25 mL * 5.0 M = 125 mmol. After adding 100 mL of water, the total volume becomes 125 mL. The final concentration is 125 mmol / 125 mL = 1.0 M.

If 100 ML of Water Is Added to 25 ML of of 5.0