A scientist makes an acid solution by adding drops of acid to 1.2 L of water. The final volume of the acid solution is 1.202 L . Assuming the volume of each drop is 0.05 mL , how many drops were added to the water? About what percent of the acid solution is acid?

To determine the number of drops added and the percentage of acid in the solution, follow these steps: 1. **Calculate the Volume of Acid Added:** - **Initial Volume of Water:** 1.2 liters (L) - **Final Volume of Solution:** 1.202 liters (L) - **Volume of Acid Added:** \[ 1.202\,L - 1.2\,L = 0.002\,L = 2\,\text{mL} \] 2. **Determine the Number of Drops Added:** - **Volume per Drop:** 0.05 milliliters (mL) - **Number of Drops:** \[ \frac{2\,\text{mL}}{0.05\,\text{mL/drop}} = 40\,\text{drops} \] 3. **Calculate the Percentage of Acid in the Solution:** - **Total Volume of Solution:** 1.202 liters = 1202 milliliters (mL) - **Percentage of Acid:** \[ \left( \frac{2\,\text{mL}}{1202\,\text{mL}} \right) \times 100\% \approx 0.166\% \approx 0.17\% \] **Conclusion:** - **Number of Drops Added:** 40 drops - **Percentage of Acid in the Solution:** Approximately 0.17% **Final Answer:** 40 drops were added, and roughly 0.17 percent of the final solution consists of acid.