Question

write balnced molecular and ionic equations for the following reactions.

- your predictions a. CaCO3(s) and HCl(aq) m=CCosta Hel CaCl2 + H2otlar I-Cacost2+1+2017+ cats CT HH OKO b. Well 5C [Ni(NO3)2 + NaOH) and HCl(aq) identify acids and C. HCl(aq) + NH3(aq) paper is affected. itmJIJI paper is affected. d. CH3COOH(aq) + NaOH(aq) Tue you use to test paper, you in cobr. Unlike 5. Which observations are the bases of identifying your unknown? Be specific. you use to test notice Wir the

Answer 1

Ans :

(a). Balance molecular Chemical equation :

CaCO₃ (s) + 2 HCl (aq) -----------------> CaCl₂ (aq) + H₂O (l) + CO₂ (g)

Complete balance Chemical equation :

CaCO₃ (s) + 2 H⁺ (aq) + 2 Cl^- (aq) -----------------> Ca²⁺ (aq) + 2 Cl^- (aq) + H₂O (l) + CO₂ (g)

Net ionic equation : Cancel the spectator ion i.e. Cl^- on both the side.

CaCO₃ (s) + 2 H⁺ (aq) -----------------> Ca²⁺ (aq) + H₂O (l) + CO₂ (g)

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(b). Balance molecular Chemical equation :

Ni(NO₃)₂ (aq) + 2 NaOH (aq) -----------------> Ni(OH)₂ (s) + 2 NaNO₃ (aq)

Complete balance Chemical equation :

Ni²⁺ (aq) + 2 NO₃^- (aq) + 2 Na⁺ (aq) + 2 OH^- (aq) -----------------> Ni(OH)₂ (s) + 2 Na⁺ (aq) + 2 NO₃^- (aq)

Net ionic equation : Cancel the spectator ions i.e. Na⁺ and NO₃^- on both the side.

Ni²⁺ (aq) + 2 OH^- (aq) -----------------> Ni(OH)₂ (s)

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Balance molecular Chemical equation :

Ni(NO₃)₂ (aq) + 2 HCl (aq) -----------------> NiCl₂ (aq) + 2 HNO₃ (aq)

Complete balance Chemical equation :

Ni²⁺ (aq) + 2 NO₃^- (aq) + 2 H⁺ (aq) + 2 Cl^- (aq) -----------------> Ni²⁺ (aq) + 2 Cl^- (aq) + 2 H⁺ (aq) + 2 NO₃^- (aq)

Net ionic equation : Cancel the spectator ions i.e. Ni²⁺ , H⁺ , Cl^- and NO₃^- on both the side.

No Reaction

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(c). Balance molecular Chemical equation :

HCl (aq) + NH₃ (aq) -----------------> NH₄Cl (aq)

Complete balance Chemical equation :

H⁺ (aq) + Cl^- (aq) + NH₃ (aq) -----------------> NH₄⁺ (aq) + Cl^- (aq)

Net ionic equation : Cancel the spectator ion i.e. Cl^- on both the side.

H⁺ (aq) + NH₃ (aq) -----------------> NH₄​​​​​​​⁺ (aq)

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(d). Balance molecular Chemical equation :

CH₃COOH (aq) + NaOH (aq) -----------------> CH₃COONa (aq) + H₂O (l)

Complete balance Chemical equation :

CH₃COOH (aq) + Na⁺ (aq) + OH^- (aq) -----------------> CH₃COO^- (aq) + Na⁺ (aq) + H₂​​​​​​​O (l)

Net ionic equation : Cancel the spectator ion i.e. Na⁺ on both the side.

CH₃COOH (aq) + OH^- (aq) -----------------> CH₃COO^- (aq) + H₂​​​​​​​O (l)