 Identify the precipitate (if any) that forms when the following solutions are mi vadulgattp 2021-11-24 Answered
Identify the precipitate (if any) that forms when the following solutions are mixed, and write a balanced equation for each reaction. KOH and
$$\displaystyle{C}{u}{\left({N}{O}_{{{3}}}\right)}_{{{2}}}$$

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Step 1
Ionic compounds containing hydroxide ions are insoluble unless they contain an alkali metal ion, or a bsrium, strontium, or calcium ion. Because hydroxide reacts with copper, it will form a solid precipitate.
$$\displaystyle{2}{K}{O}{H}{\left({a}{q}\right)}+{C}{u}{\left({N}{O}{3}\right)}{2}{\left({a}{q}\right)}\rightarrow{2}{K}{N}{O}_{{{3}}}{\left({a}{q}\right)}+{C}{u}{\left({O}{H}\right)}_{{{2}}}{\left({s}\right)}$$
The precipitate is copper (II) hydroxide, see work for the balanced equation.
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Step 1
When potassium hydroxide reacts with copper nitrate, a pale greenish blue precipitate of copper hydroxide is formed along with the formation of potassium nitrate.
This reaction is a type of precipitation reaction because a precipitate is being formed.
The equation for the reaction between the two follows: $$\displaystyle{2}{K}{O}{H}{\left({a}{q}.\right)}+{C}{u}{\left({N}{O}_{{{3}}}\right)}_{{{2}}}{)}{a}{q}.{)}\rightarrow{2}{K}{N}{O}_{{{3}}}{\left({a}{q}.\right)}+{C}{u}{\left({O}{H}\right)}_{{{2}}}{\left({s}\right)}$$
By Stoichiometry of the reaction:
2 moles of potassium hydroxide reacts with 1 mole of copper nitrate to produce 2 moles of potassium nitrate and 1 mole of copper hydroxide.