$CATEGORY: Science - Khan Academy/2.Acids, Bases and Salts/2.Acids, Bases and Salts--how strong are acid or base solutions

//Multiple Choice

What happens when HCl is mixed with water?
{
~ It partially dissociates.
= It completely dissociates.
~ It does not dissociate.
~ It forms a buffer solution.
}

Which of the following is a weak acid?
{
~ HCl
~ HNO₃
= CH₃COOH
~ H₂SO₄
}

Which of the following is an example of a strong acid?
{
~ Acetic acid
= Hydrochloric acid
~ Citric acid
~ Carbonic acid
}

What is the main characteristic of a weak acid?
{
~ It dissociates completely.
= It only partially dissociates.
~ It does not dissociate in water.
~ It produces OH⁻ ions.
}

What happens to the ions in a weak acid solution after dissociation?
{
~ They remain free in the solution.
= They combine back to form the acid.
~ They turn into neutral water molecules.
~ They become hydroxide ions.
}

Which of these acids is considered strong?
{
~ H₂CO₃
= HNO₃
~ HF
~ CH₃COOH
}

Which of the following is a weak base?
{
~ NaOH
~ KOH
= NH₄OH
~ LiOH
}

Which of the following will give very few H⁺ ions in solution?
{
~ HCl
~ H₂SO₄
= Acetic acid
~ HNO₃
}

//True or False

CH₃COOH is a weak acid. {T}

All acids are strong acids. {F}

H₂SO₄ dissociates completely into H⁺ and SO₄²⁻ ions. {T}

The dissociation of a strong acid produces both H⁺ and OH⁻ ions. {F}

Acetic acid produces H⁺ and CH₃COO⁻ ions in solution. {T}

HCl is more dangerous than acetic acid to the human body. {T}

Weak acids are less harmful than strong acids due to lower H⁺ ion concentration. {T}

//Fill in the blanks

HCl is a ______ acid because it dissociates completely in water.
{
~ weak
= strong
~ neutral
~ buffer
}

Acetic acid is also known as ______.
{
~ H₂CO₃
= CH₃COOH
~ HNO₃
~ HCl
}

The dissociation of HCl produces ______ ions in solution.
{
~ OH⁻
= H⁺ and Cl⁻
~ H⁺ and OH⁻
~ H₂O
}

The ions produced from acetic acid dissociation are H⁺ and ______.
{
~ SO₄²⁻
~ Cl⁻
= CH₃COO⁻
~ Na⁺
}

The dissociation of a strong acid results in ______ concentration of H⁺ ions.
{
~ a low
= a high
~ no
~ moderate
}

The ion that forms when acetic acid dissociates is called ______ ion.
{
~ chloride
~ sulphate
= acetate
~ hydroxide
}

The complete dissociation of H₂SO₄ produces ______ H⁺ ions per molecule.
{
~ 1
= 2
~ 3
~ 4
}

A weak acid like acetic acid will produce ______ H⁺ ions in solution.
{
~ many
= few
~ no
~ equal
}

NH₄OH is an example of a ______ base.
{
~ strong
= weak
~ neutral
~ ionic
}

//Numericals



//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=NH₄OH -> Weak base
=H₂SO₄ -> Strong acid
=CH₃COOH -> Weak acid
=NaOH -> Strong Base
=H₂O -> Neutral
}


//******** END **********