A solution reacts with zinc powder to give a gas that explodes when burnt. The solution contains : a) NaOH. b) NaCl. c) Na2CO3. d) HCl
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The gas that burns explosively is hydrogen gas.
Hydrogen gas can be formed by the following reaction:
Zn(s) + 2HCl(aq) ------> ZnCl2(aq) + H2(g)
The reaction between zinc and the other choices:
a) NaOH---zinc is lower than sodium in the reactivity series, hence will not displace sodium. The only reason why this reaction might occur,is because zinc is amphoteric and reacts both with acids and bases.
b) NaCl-----Zinc will not displace Na in the NaCl, hence reaction will not occur.
c)Na2CO3-----Zinc does not replace Na, hence no reaction occurs.
Hydrogen gas can be formed by the following reaction:
Zn(s) + 2HCl(aq) ------> ZnCl2(aq) + H2(g)
The reaction between zinc and the other choices:
a) NaOH---zinc is lower than sodium in the reactivity series, hence will not displace sodium. The only reason why this reaction might occur,is because zinc is amphoteric and reacts both with acids and bases.
b) NaCl-----Zinc will not displace Na in the NaCl, hence reaction will not occur.
c)Na2CO3-----Zinc does not replace Na, hence no reaction occurs.
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