Question

question 4
which of the following indicates a basic solution?
a h+=1×10^-7 m.
b ph less than 7.
c ph equal to 7.
d ph greater than 7.

Explanation:

Step1: Recall pH formula

The formula for pH is \(pH = -\log[H^{+}]\).

Step2: Analyze option A

If \([H^{+}]=1\times10^{-7}M\), then \(pH = -\log(1\times10^{-7}) = 7\) (neutral solution).

Step3: Analyze option B

If \(pH\lt7\), then \([H^{+}]\gt1\times10^{-7}M\) (acidic solution).

Step4: Analyze option C

If \(pH = 7\), then \([H^{+}]=1\times10^{-7}M\) (neutral solution).

Step5: Analyze option D

If \(pH\gt7\), then \([H^{+}]\lt1\times10^{-7}M\) (basic solution).

Answer:

D. pH greater than 7