The lower the ph of a solution, the a. greater the number of oxygen atoms b. more acidic the solution c. less toxic the solution d. higher the oh— concentration

b.more acidic the solution

Explanation:

pH is the measure of acidity or alkalinity of a solution.  Acids are substances which gives ions when dissolved in water.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

Thus as pH and are inversely related, a solution having lower pH will have more amount of concentration , a lower amount of concentration and will be more acidic.

if you're asking what comes out, it's steam.