Question

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Answer 1

Identification of the nature of the salt.

Identify which acid and base reacted to produce the salt, and then identify if the acid/base is strong or weak, and then apply the following:

Strong Acid + Weak Base = Acidic salt.

Strong Base + Weak Acid = Basic salt.

Strong Acid + Strong Base = Neutral salt.

We know that:

Acid + Base ➝ Salt + H₂O

Q1) Sodium Phosphate.

A) Chemical formulae ⇒ Na₃PO₄.

Wkt, Acid + Base ➝ Na₃PO₄ + H₂O

$\sf \Longrightarrow Na_3PO_4 \longrightarrow Na^+ \ + \ PO_{4}^{2-}$

$\sf \Longrightarrow H_{2}O \longrightarrow H^{+} \ + \ OH^{-}$

Here, Na⁺ (cation) and OH⁻ (anion) gives NaOH.

And, PO₄²⁻ (anion) and H⁺ (cation) gives H₃PO₄.

∴ We get: H₃PO₄ + NaOH ➝ Na₃PO₄ + H₂O

Here, H₃PO₄ is a weak acid and NaOH is a strong base.

Na₃PO₄ it's a Basic Salt.

Q2) Calcium Nitrate.

A) Chemical formulae ⇒ Ca(NO₃)₂.

Wkt, Acid + Base ➝ Ca(NO₃)₂ + H₂O

$\sf \Longrightarrow Ca(NO_3)_2 \longrightarrow Ca^{2+} \ + \ NO_{3}^{-}$

$\sf \Longrightarrow H_{2}O \Longrightarrow H^{+} \ + \ OH^{-}$

Here, Ca²⁺ (cation) and OH⁻ (anion) gives Ca(OH)₂.

And, NO₃⁻ (anion) and H⁺ (cation) gives HNO₃.

∴ We get: HNO₃ + Ca(OH)₂➝ Ca(NO₃)₂ + H₂O

Here, HNO₃ is a strong acid and Ca(OH)₂ is a strong base.

Ca(NO₃)₂ it's a Neutral Salt.

Q3) Pottasium Sulphate.

A) Chemical formulae ⇒ K₂SO₄.

Wkt, Acid + Base ➝ K₂SO₄ + H₂O

$\sf \Longrightarrow K_2SO_{4} \longrightarrow K^{+} \ + \ SO_{4}^{-2}$

$\sf \Longrightarrow H_{2}O \Longrightarrow H^{+} \ + \ OH^{-}$

Here, K⁺ (cation) and OH⁻ (anion) gives KOH.

And, SO₄⁻² (anion) and H⁺ (cation) gives H₂SO₄.

∴ We get: H₂SO₄ + KOH➝ K₂SO₄ + H₂O

Here, H₂SO₄ is a strong acid and KOH is a strong base.

K₂SO₄ is a Neutral Salt.

Q4) Sodium Carbonate.

A) Chemical formulae ⇒ Na₂CO₃.

Wkt, Acid + Base ➝ Na₂CO₃ + H₂O

$\sf \Longrightarrow Na_{2}CO_{3} \longrightarrow Na^{+} \ + \ CO_{3}^{2-}$

$\sf \Longrightarrow H_{2}O \Longrightarrow H^{+} \ + \ OH^{-}$

Here, Na⁺ (cation) and OH⁻ (anion) gives NaOH.

And, CO₃⁻² (anion) and H⁺ (cation) gives H₂CO₃.

∴ We get: H₂CO₃ + NaOH ➝ Na₂CO₃ + H₂O

Here, H₂CO₃ is a weak acid and NaOH is a strong base.

Na₂CO₃ is a Basic Salt.

Q5) Magnesium Chloride.

A) Chemical formulae ⇒ MgCl₂.

Wkt, Acid + Base ➝ MgCl₂ + H₂O

$\sf \Longrightarrow MgCl_{2} \longrightarrow Mg^{2+} \ + \ Cl^{-}$

$\sf \Longrightarrow H_{2}O \Longrightarrow H^{+} \ + \ OH^{-}$

Here, Mg²⁺ (cation) and OH⁻ (anion) gives Mg(OH)₂.

And, Cl⁻ (anion) and H⁺ (cation) gives HCl.

∴ We get: HCl + Mg(OH)₂ ➝ MgCl₂ + H₂O

Here, HCl is a strong acid and Mg(OH)₂ is a strong base.

MgCl₂ is a Neutral Salt.

Q6) Pottasium acetate.

A) Chemical formulae ⇒ C₂H₃KO₂.

Wkt, Acid + Base ➝ C₂H₃KO₂ + H₂O

$\sf \Longrightarrow C_{2}H_{3}KO_{2} \longrightarrow K^{+} \ + \ CH_{3}COO^{-}$

$\sf \Longrightarrow H_{2}O \Longrightarrow H^{+} \ + \ OH^{-}$

Here, K⁺ (cation) and OH⁻ (anion) gives K(OH).

And, CH₃COO⁻ (anion) and H⁺ (cation) gives CH₃COOH.

∴ We get: CH₃COOH + K(OH) ➝ C₂H₃KO₂ + H₂O

Here, CH₃COOH is a weak acid and K(OH) is a strong base.

C₂H₃KO₂ is a Basic Salt.

Q7) Copper Sulphate.

A) Chemical formulae ⇒ CuSO₄.

Wkt, Acid + Base ➝ CuSO₄ + H₂O

$\sf \Longrightarrow CuSO_{4} \longrightarrow Cu^{2+} \ + \ SO_{4}^{-2}$

$\sf \Longrightarrow H_{2}O \Longrightarrow H^{+} \ + \ OH^{-}$

Here, Cu²⁺ (cation) and OH⁻ (anion) gives Cu(OH)₂.

And, SO₄⁻² (anion) and H⁺ (cation) gives H₂SO₄.

∴ We get: H₂SO₄ + Cu(OH)₂ ➝ CuSO₄ + H₂O

Here, H₂SO₄ is a strong acid and Cu(OH)₂ is a weak base.

CuSO₄ is an Acidic Salt.

Q8) Aluminium Nitrate.

A) Chemical formulae ⇒ Al(NO₃)₃.

Wkt, Acid + Base ➝ Al(NO₃)₃ + H₂O

$\sf \Longrightarrow Al(NO_3)_{3} \longrightarrow Al^{3+} \ + \ NO_{3}^{-}$

$\sf \Longrightarrow H_{2}O \Longrightarrow H^{+} \ + \ OH^{-}$

Here, Al³⁺ (cation) and OH⁻ (anion) gives Al(OH)₃.

And, NO₃⁻ (anion) and H⁺ (cation) gives HNO₃.

∴ We get: HNO₃ + Al(OH)₃ ➝ Al(NO₃)₃ + H₂O

Here, HNO₃ is a strong acid and Al(OH)₃ is a weak base.

Al(NO₃)₃ an Acidic Salt.

Q9) Aluminium Chloride.

A) Chemical formulae ⇒ AlCl₃.

Wkt, Acid + Base ➝ AlCl₃ + H₂O

$\sf \Longrightarrow AlCl_{3} \longrightarrow Al^{3+} \ + \ Cl^{-}$

$\sf \Longrightarrow H_{2}O \Longrightarrow H^{+} \ + \ OH^{-}$

Here, Al³⁺ (cation) and OH⁻ (anion) gives Al(OH)₃.

And, Cl⁻ (anion) and H⁺ (cation) gives HCl.

∴ We get: HCl + Al(OH)₃ ➝ AlCl₃ + H₂O

Here, HCl is a strong acid and Al(OH)₃ is a weak base.

AlCl₃ is an Acidic Salt.

Q10) Zinc Sulphate.

A) Chemical formulae ⇒ ZnSO₄.

Wkt, Acid + Base ➝ ZnSO₄ + H₂O

$\sf \Longrightarrow ZnSO_{4} \longrightarrow Zn^{2+} \ + \ SO_4^{-2}$

$\sf \Longrightarrow H_{2}O \Longrightarrow H^{+} \ + \ OH^{-}$

Here, Zn²⁺ (cation) and OH⁻ (anion) gives Zn(OH)₂.

And, SO₄⁻² (anion) and H⁺ (cation) gives H₂SO₄.

∴ We get: H₂SO₄ + Zn(OH)₂ ➝ ZnSO₄ + H₂O

Here, H₂SO₄ is a strong acid and Zn(OH)₂ is a weak base.

ZnSO₄ is an Acidic Salt.