How does the presence of an acid in a water solution affect the ph of the solution?
it lowers the ph.
it does not affect the ph.
it raises the ph.
it neutralizes the ph.

It lowers the pH.

Explanation:

pH (or hydrogen potential) is a value that indicates the concentration of hydrogen ions (H⁺), which shows whether a substance is acidic, neutral or alkaline.

These values generally range from 0 to 14, with substances having a pH of 0 to 7 considered acidic, those with 7 considered neutral, and those having values above 7 are alkaline.

Thus, the lower the pH of a substance, the higher the concentration of ions H⁺ and therefore the more acidic it will be. So, the addition of an acidic substance to a compound implies a reduction in pH.

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.