Question

Calculate the final concentration if 2.00 L of 3.00 M NaCl, 4.00 L of 1.50 M NaCl and 4.00 L of water are mixed. Assume there is no volume contraction upon mixing.

Answer 1

Answer on Question#71842 – Chemistry – Organic chemistry

Question: Calculate the final concentration if 2.00 L of 3.00 M NaCl, 4.00 L of 1.50 M NaCl and 4.00 L of water are mixed. Assume there is no volume contraction upon mixing.

Solution:

$$C_M (NaCl \text{ final}) = \frac{n (NaCl \text{ final})}{V (\text{solution})} = \frac{2.00 L \times 3.00 \frac{\text{mol}}{L} + 4.00 L \times 1.50 \frac{\text{mol}}{L}}{2.00 L + 4.00 L + 4.00 L} = \frac{12 \text{ mol}}{10 \text{ L}} = 1.2 \frac{\text{mol}}{L} = 1.2 M$$

Answer: 1.2 M.

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