Question

whats the molarity of a solution of NaCl if 35 mL of .30 M of it are diluted to 500 mL?

Answer 1

Answer on Question #42927 - Chemistry - Other

Question:

What is the molarity of a solution of NaCl if 35 mL of 0.30 M of it are diluted to 500 mL?

Answer:

$$\text{molarity} = \frac{\text{moles of solute}}{\text{liter of solution}}$$

From this equation we calculate moles of solute of NaCl in 35 mL of 0.30 M.

$$\text{moles of solute} = \text{molarity} \times \text{liter of solution} = 0.3 \, \text{M} \times 0.035 \, \text{L} = 0.0105 \, \text{moles}$$

Now we calculate molarity of 0.0105 moles of NaCl diluted in 500 mL.

$$\text{molarity} = \frac{0.0105 \, \text{moles}}{0.500 \, \text{L}} = 0.021 \, \text{M}$$

Answer: 0.021 M

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