Explain what happens to an ionic substance when it dissolves in water. drag the terms on the left to the appropriate blanks on the right to complete the sentences. ionic compounds dissolve in water and dissociate into the ionic compounds dissolve in water and dissociate into the blank that make up the compound. for example, nacl in water will form blank ( a q ) (element of the i group) and blank ( a q ) (element of the vii group). that make up the compound. for example, nacl in water will form ionic compounds dissolve in water and dissociate into the blank that make up the compound. for example, nacl in water will form blank ( a q ) (element of the i group) and blank ( a q ) (element of the vii )(element of the i group) and ionic compounds dissolve in water and dissociate into the blank that make up the compound. for example, nacl in water will form blank ( a q ) (element of the i group) and blank ( a q ) (element of the vii )(element of the vii group).

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form() .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.