# Complete and balance each of the following equations for gas evolution reactions.?

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1: HBr(aq)+NaHCO3(aq)→

2: NH4I(aq)+KOH(aq)→

3: HNO3(aq)+K2SO3(aq)→

4: HI(aq)+Li2S(aq)→

• 1: HBr(aq)+NaHCO3(aq)→

When hydrogen combines with a bicarbonate ion, the product is hydrogen carbonate. This decomposes to produce carbon dioxide and water. The other product is sodium bromide.

HBr(aq)+NaHCO3(aq) → H2O + CO2 (g) + NaBr

2: NH4I(aq)+KOH(aq)→

When an ammonium ion and a hydroxide ion combine, the product is ammonium hydroxide. This will decompose to produce ammonia and water.

NH4I(aq)+KOH(aq)→ KI (aq) + NH3 ( g) + H2O

3: HNO3(aq)+K2SO3(aq)→

When hydrogen combines with a sulfite ion, the product is called sulfurous acid. This will produce sulfurous acid. This will decompose to produce sulfur dioxide gas and water.

HNO3(aq)+K2SO3(aq)→ KNO3(aq)→ + SO2 (g) + H2O

To balance this reaction, we need two nitric acid and two potassium nitrate.

2 HNO3(aq)+K2SO3(aq)→2 KNO3 (aq)→ SO2 (g) + H2O

4: HI(aq)+Li2S(aq)→

In this reaction, the gas is hydrogen sulfide. (H2S)

HI(aq)+Li2S(aq)→ H2S (g) + LiI (aq)

To balance this reaction, we need 2 HI and 2 LI.

2 HI(aq)+Li2S(aq)→ H2S (g) + 2 LiI (aq)

I hope this is helpful for you.

• HBr(aq) + NaHCO3(aq) ===⇒ NaBr(aq) + H2O(l) + CO2(g)

NH4I(aq) + KOH(aq) ==⇒ KI(aq) + H2O(l) + NH3(g)

2HNO3(aq) + K2SO3(aq) =⇒ 2KNO3(aq) + H2O(l) + SO2(g)

2HI(aq) + Li2S(aq) ==⇒ 2LiI(aq) + H2S(g)

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