Identify the Bronsted-Lowry acid-base pair in the following equation:

HCN + NO2- ⇌ CN- + HNO2

      HCN    +       NO₂⁻        ⇌               CN⁻            +          HNO₂

Weak acid     Strong base        Conj. strong base      Conj. weak acid

Explanation:

In the Bronsted-Lowry theory we identify the acids as the compounds that can release protons and the bases, the compounds that can accept them.

For example:

HCl → It can release the proton → Acid → Hydrochloric acid

NH₃ → It can accept a proton → Base → Ammonia

The equation is:

HCN + NO₂⁻ ⇌ CN⁻ + HNO₂

Cianhydric acid release a proton (acid) to the nitrite (base).

Nitrite can accept the proton (base) to become nitrous acid.

Then, the cianide can also accept the proton (base) to become cianhydric acid, again.

chemical energy is stored in the chemical bonds of atoms and molecules. it can only be seen when it is released in a chemical reaction. when chemical energy is released, the substance from which the energy came is often changed into an entirely different substance.

this chemical reaction releases energy in the form of light and heat. chemical energy is the potential energy stored in the arrangement of atoms within molecules. breaking chemical bonds requires energy, while forming new chemical bonds releases energy.

the atp molecule can store energy in the form of a high energy phosphate bond joining the terminal phosphate group to the rest of the molecule. in this form,energy can be stored at one location, then moved from one part of the cell to another, where it can be released to drive other biochemical reactions.