AP BIOLOGY

BIOCHEMISTRY

PROPERTIES OF WATER

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A solution has a pH of 7.0. What would happen to the pH if H ions were added?
A
pH would go up
B
pH would go down
C
pH would stay the same
D
None of these
Explanation: 

Detailed explanation-1: -if H+ ions were added, then the pH will decrease.

Detailed explanation-2: -This pH value of 7 is important because it indicates a neutral solution. All other substances are compared to this neutral point. Any solution that has a pH of less than 7 is considered acidic, and anything above a pH of 7 is basic.

Detailed explanation-3: -A pH of 7 indicates a neutral solution, a pH greater than 7 indicates a basic solution, and a pH of less than 7 indicates an acidic solution. The farther a pH value is from 7, the more strongly acidic or basic it is. For example, water with a pH of 6 is mildly acidic, and water with a pH of 3 is highly acidic.

Detailed explanation-4: -Whenever the value of pOH is less than 7, then it is considered basic. And therefore there are more OH-than H+ in the solution. At pH 7, the substance or solution is at neutral and means that the concentration of H+ and OH-ion is the same.

Detailed explanation-5: -A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 is basic. The pH scale is logarithmic and as a result, each whole pH value below 7 is ten times more acidic than the next higher value.

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