# chemistry

i need to deduce the type of bonding that holds sodium cyanide together
and write a balanced equation for sodium cyanide dissolving in water

any help would be appreciated

sarah

Na^+ + :C:::N:^-
Na to CN bond is ionic (more or less).
C-N bond is covalent.
NaCN + HOH ==> NaOH + HCN.
The Na is not involved. The net ionic equation is
CN^- + HOH ==> HCN + OH^-

thank you very much for getting back to me but i'm more confused now
how do you get the balanced chemical equation NaOH + HCN
i also need to state whether it is covelent or ionic the text i have worked from doesn't say which is involved in these bonds it just wants one or the other
i'm beginning to think i should have chosen a different subject.

I have the same question. I took write a balanced equation for the reaction that occurs when sodium cyanide dissolves in water as a separate question, to the type of bonding.

CN^- + HOH ==> HCN + OH^-.

CN^- is a stronger Bronsted-Lowry base than water; therefore, it pulls a H^+ away from HOH to form HCN. The OH^- remains. That means that a solution of NaCN is basic BECAUSE OH^- are produced. You can even calculate the ionization constant for CN^- as a base. It is Kw for water/Ka for HCN.

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