A value of pH 7.0 indicates A. an zero hydrogen-ion concentration. B. the lowest hydrogen-ion concentration. C. the highest hydrogen-ion concentration. D. equal hydrogen and hydroxide-ion concentration.

The correct answer is D. equal hydrogen and hydroxide-ion concentration.

Explanation:

The pH indicates the alkalinity or acidity of a solution. The pH less than 7 are acidic (more H + ions) and greater than 7 are basic (less H + ions). A pH of 7 indicates a neutral solution, being the case of water.

The water dissociation constant (Kw) = 1e10-14 = (H +) (OH-), and with pH = 7.00, the concentration of H + = antilog -pH = antilog -7 = 1e10-7 is calculated. Thus using the formula of kw, we calculate the concentration of OH- that at pH = 7, 00 is equal to the concentration of H +:

Kw = (H +) (OH-)

1e10-14 = 1e10-7 (OH-)

(OH -) = 1e10-14 / 1e10-7 = 1e10-7

what's the question?

explanation:

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.