1. What ions are present in solution upon dissolving each of the following subst
ID: 922660 • Letter: 1
Question
1. What ions are present in solution upon dissolving each of the following substances in water;
a. HNO3
b.(NH4)2SO4
2. Indicate which element is oxidized and which is reduced in the following reaction.
Fe2O3(s)+3CO(g)2Fe(s)+3CO2(g)
3. A mixture of 45.0mL of 0.272M NaCl and 65.0mL of 0.0247M (NH4)2CO3. Assume that the volumes are additive. Expres answere with 3 sig figs
4.Indicate the concentration of each ion or molecule present in the following solutions, express answer in 2 sigfigs
a. 0.20 M NaNO3
b. 1.1×102M MgSO4
Explanation / Answer
1. a. HNO3 + H2O ------> H3O+ + NO3-
b. (NH4)2 SO4 ----->2 NH4+ + SO4^2-
2. Fe2O3(s)+3CO(g)2Fe(s)+3CO2(g)
Iron (Fe) is getting reduced as the oxidation number goes from +3 to 0
Carbon is getting oxidisied as the oxidation number goes from +2 to +4
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