Gas Forming Reactions - 2 CO 3 , such as HCl (aq) + NaHCO 3...

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Gas Forming Reactions Sometimes a gas will be involved as one of the reactants or products in a solution  reaction. For example, 2 HCl (aq)  + Na 2 S (aq)    H 2 S (gas)  + 2 NaCl (aq) In this example the complete ionic equation would be: 2 H + (aq)  + 2Cl - (aq)  + 2Na + (aq)  + S 2- (aq)    H 2 S (g)  + 2Na + (aq)  + 2Cl - (aq) Removing the spectator ions we obtain the net ionic equation: 2 H + (aq)  + S 2- (aq)    H 2 S (g) H 2 S is just one example of a gaseous substance that can form in a solution reaction.  Another way gases can form in solution is through the decomposition of weak  electrolytes. For example, H 2 CO 3  readily decomposes into H 2 O and CO 2  gas, H 2 CO 3 (aq)    H 2 O (l)  + CO 2 (g) So, any solution reaction that leads to the production of H
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Unformatted text preview: 2 CO 3 , such as HCl (aq) + NaHCO 3 (aq) NaCl (aq) + H 2 CO 3 (aq) will ultimately lead to the production of H 2 O and CO 2 gas as the H 2 CO 3 decomposes, giving us a new equation: HCl (aq) + NaHCO 3 (aq) NaCl (aq) + H 2 O (l) + CO 2 (g) If we eliminate all the spectator ions we would write the net ionic equation as H + (aq) + HCO 3-(aq) H 2 O (l) + CO 2 (g) Two other substances that will decompose and form gases are H 2 SO 3 and NH 4 OH: H 2 SO 3 (aq) H 2 O (l) + SO 2 (g) NH 4 OH (aq) H 2 O (l) + NH 3 (g)...
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Gas Forming Reactions - 2 CO 3 , such as HCl (aq) + NaHCO 3...

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