Question

1. The pH of soda is generally around 3, while the pH of drinking water is generally around 7. A student comparing the two beverages concludes that soda is generally 10,000 more acidic than water. In three to four sentences, explain if her conclusion is correct or incorrect and why.

2. If a balloon is kept at a constant temperature, what pressure change would need to occur for the volume to increase to three times the size? Explain your answer.

Answer 1

Here you go

Step-by-step explanation:

1. No, her conclusion is incorrect. pH is a logarithmic scale, which means that a difference of 1 pH unit corresponds to a 10-fold difference in acidity. Therefore, a difference of 3 pH units corresponds to a 1000-fold difference in acidity, not 10,000. So soda is generally 1000 times more acidic than water.

2.The pressure of the balloon would need to decrease in order for the volume to increase to three times the size. This is due to the fact that air inside the balloon is a gas, and its volume is inversely proportional to the pressure of the gas. Therefore, a decrease in pressure would result in an increase in volume.