Question

question 7
a solution that dissociates to release hydrogen ions into solution and thus causes a decrease in ph is ____________.
answer
an acid
a salt
water
a base
i dont know yet

Explanation:

According to the Arrhenius acid - base theory, an acid is a substance that dissociates in water to produce hydrogen ions ($H^+$), which lowers the pH of the solution. Salts are products of acid - base reactions and do not release hydrogen ions to lower pH. Water is neutral and has a pH of 7. A base releases hydroxide ions ($OH^-$) and increases the pH.

Answer:

A. an acid