express your understanding of ph, poh, and the identity of a solution as being acidic, basic, or neutral by…

Explanation:

The relationship between pH and pOH at 25°C is given by the equation $pH + pOH = 14.000$. The acidity or basicity of a solution is determined by its pH:

• If $pH < 7.000$, the solution is acidic.
• If $pH = 7.000$, the solution is neutral.
• If $pH > 7.000$, the solution is basic. We will use these principles to complete each row of the table.

Step 1: Complete Row A

Given $pH = 7.000$. Calculate pOH using $pOH = 14.000 - pH$. Determine acidity/basicity based on pH. $$ pOH = 14.000 - 7.000 = 7.000 $$ Since $pH = 7.000$, the solution is Neutral.

Step 2: Complete Row B

Given $pOH = 4.000$. Calculate pH using $pH = 14.000 - pOH$. Determine acidity/basicity based on pH. $$ pH = 14.000 - 4.000 = 10.000 $$ Since $pH = 10.000 > 7.000$, the solution is Basic.

Step 3: Complete Row C

Given $pH = 2.700$. Calculate pOH using $pOH = 14.000 - pH$. Determine acidity/basicity based on pH. $$ pOH = 14.000 - 2.700 = 11.300 $$ Since $pH = 2.700 < 7.000$, the solution is Acidic.

Step 4: Complete Row D

Given $pOH = 11.600$. Calculate pH using $pH = 14.000 - pOH$. Determine acidity/basicity based on pH. $$ pH = 14.000 - 11.600 = 2.400 $$ Since $pH = 2.400 < 7.000$, the solution is Acidic.

Step 5: Complete Row E

Given $pH = 12.400$. Calculate pOH using $pOH = 14.000 - pH$. Determine acidity/basicity based on pH. $$ pOH = 14.000 - 12.400 = 1.600 $$ Since $pH = 12.400 > 7.000$, the solution is Basic.

Answer:

The completed table is:

	pH Value	pOH Value	Acid, Base, or Neutral?
A	7.000	7.000	Neutral
B	10.000	4.000	Basic
C	2.700	11.300	Acidic
D	2.400	11.600	Acidic
E	12.400	1.600	Basic