Question

answer the following questions focusing on what you learned sodlab6: reaction types
question 38 (1 point) ✓ saved
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a lab technician mistakenly creates a 0.700 m solution that is too concentrated to be safely used in the lab experiment. in order to fix the mistake, the solution must be diluted. what volume of water must be added to create a 15 ml solution with the correct concentration of 0.140 m?
5.0 ml
1.5 ml
12 ml
3.0 ml
0.33 ml

Explanation:

Step1: Use the dilution formula

The dilution formula is \(C_1V_1 = C_2V_2\), where \(C_1 = 0.700\space M\), \(C_2=0.140\space M\), and \(V_2 = 15\space mL\). We need to find \(V_1\).

$$V_1=\frac{C_2V_2}{C_1}$$

$$V_1=\frac{0.140\space M\times15\space mL}{0.700\space M}$$

$$V_1 = 3\space mL$$

Step2: Calculate the volume of water to be added

The final volume \(V_2 = 15\space mL\), and the initial volume of the concentrated solution \(V_1=3\space mL\). The volume of water to be added \(V_{water}=V_2 - V_1\)

$$V_{water}=15\space mL - 3\space mL$$

$$V_{water}=12\space mL$$

Answer:

12 mL