M-U7-Z2 All Questions

Front

What is the definition of pH?

Back

pH is a measure of the acidity or basicity of a solution, defined as the negative logarithm of the hydrogen ion concentration: pH = -log[H₃O⁺].

Front

What is the relationship between [H₃O⁺] and [OH^-] in a neutral solution?

Back

In a neutral solution, [H₃O⁺] = [OH^-] = 1 x 10^-7 M at 25°C.

Front

How do you calculate the concentration of a solution after a neutralization reaction?

Back

Use the formula: M₁V₁ = M₂V₂, where M is molarity and V is volume.

Front

What is the formula for calculating pH from molarity of a strong acid?

Back

pH = -log[H₃O⁺]. For strong acids, [H₃O⁺] is equal to the molarity of the acid.

Front

What is the significance of a pH of 7?

Back

A pH of 7 indicates a neutral solution, meaning it is neither acidic nor basic.

Front

What is the dissociation of sulfuric acid (H₂SO₄) in water?

Back

H₂SO₄ dissociates into 2 H₃O⁺ and SO₄^2- ions.

Front

What is the concentration of NaOH if 50.0 mL of 0.0500 M HCl neutralizes it?

Back

Concentration of NaOH = (M_HCl * V_HCl) / V_NaOH.

Front

What is the formula for calculating the concentration of a base after neutralization?

Back

C_base = (C_acid * V_acid) / V_base.

Front

What is the pH of a 0.0235 M H₂SO₄ solution?

Back

pH = 1.33, since it dissociates to produce 2 H₃O⁺ ions.

Front

What is the relationship between strong acids and their pH values?

Back

Strong acids completely dissociate in water, resulting in lower pH values.