1. (5) solid nickel reacts with aqueous nitric acid (hno3) to form aqueous nickel (iii) nitrate and
hydrogen gas. write out and balance the chemical equation, including phases.
2. (5) what type of reaction is this? can it undergo redox? if so, write out the balanced half-
reactions

See every answer with its explanation below

Explanation:

1. Write the molecular equation

         ↑                       ↑                               ↑                                   ↑

     solid nickel     aqueous nitric        aqueous nickel(III)     hydrogen gas

                             acid                         nitrate

2. Balance the molecular equation:

3. Type of reaction

This is a replacement reaction because the nickle is taking the place of hydrogen in the nitric acid and the hydrogen is released. It is also a redox reaction because nickel is being oxidized and hydrogen is being reduced.

The balanced half-reactions are:

         2Ni⁰ → 2Ni³⁺ + 2×(3e⁻)    

         Each nickle atom loses 3 electrons increasing its oxidation state from 0 to +3.

         6H⁺ + 6e⁻ → 3H₂⁰

         Each H⁺ gains 1 electron reducing its oxidation state from +1 to 0.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.