Question

1. a ph is a logarithmic scale that is used to describe the relative concentration of the carbon ion.

true
false

1. because ph is based on logarithms, a decrease of one means the acid is 10 times more acidic, and an increase in one means it is 10 times more basic.

true
false

1. what is the ph of a 0.0235 m hcl solution?

hint: ph = - logh+

1. what is the ph of a 0.05 m hcl solution?

hint: ph = - logh+

Explanation:

Step1: Analyze question 13

pH is a logarithmic scale for hydrogen - ion concentration, not carbon - ion concentration.

Step2: Analyze question 14

The pH scale is logarithmic. A decrease of 1 in pH means the solution is 10 times more acidic, and an increase of 1 means it is 10 times more basic.

Step3: Calculate pH for 0.0235 M HCl in question 15

HCl is a strong acid, so [H⁺]=0.0235 M. Using the formula pH = -log[H⁺], we have pH=-log(0.0235).
pH = 1.63

Step4: Calculate pH for 0.05 M HCl in question 16

Since HCl is a strong acid, [H⁺]=0.05 M. Using the formula pH = -log[H⁺], we get pH=-log(0.05).
pH = 1.30

Answer:

1. B. False
2. A. True
3. 1.63
4. 1.30