Grade 11 - Acid, base and pH

Is HNO₃ base or acid?

• Acid

• Base

• Amphoteric

KOH is a(n)

• Amphoteric

• Base

• Acid

What is the meaning of pH

• To determine the acidity or basicity of a solution

• To determine concentration of hydrogen ion in solution

• All is incorrect

• All is correct

Calcuclate the pH of solution HCl 0.02M

• -1.69

• 1.69

• 12.31

• -12.31

What is the pH of H2SO4 1.35  $\times10^{-3}$   M

• 11.43

• -2.57

• -11.43

• 2.57

What is the concentration of NaOH if its value of pH is 11.41

• $2.57\times10^{-3}$ M

• $-\ 2.57\times10^{-3}$

• $3.89\times10^{-12}$

• $-3.89\times10^{-12}$

What is value of K_w

• 10^-12

• 10^-13

• 10^-14

• 10^-15

Deduce the equation of K_w

• [H⁺]/[OH^-]

• [H⁺]²/[OH^-]²

• [H⁺]x[OH^-]

• [H⁺]²x[OH^-]²

If a solution has value of pH less than 7, it is ________ solution.

• acidic

• basic

• neutral

Determine the concentration of citric acid in lemon juice if its pH is 3.1

• 0.49

• 13.5

• 7.9x10^-4

• 1.26x10^-11