Select the pair that consists of a base and its conjugate acid in that order. CO32−/CO22−

H3PO4/ HPO42−

H2CO3/HCO3−

NH3/NH4+

HCO3−/CO32−

Please answer quickly.

The pair that consists of a base and its conjugate acid in that order.

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

 is gaining a proton, thus it is considered as a brønsted-lowry base and after gaining a proton, it forms  which is a conjugate acid.

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.

give me abc and i will get it for u.