A solution of ammonia NH3(aq) is at equilibrium. How would the equilibrium change if NH4+ were added to the solution? A. The equilibrium would shift to produce more NH4+.

B. The equilibrium would shift to produce less NH4+.

C. The equilibrium would shift to produce more NH3.

D. The equilibrium would shift to produce more H+.​

C. The equilibrium would shift to produce more NH₃(g)

Explanation:

NH₃(aq) + H₂O(l) ⇄ NH₄⁺(aq) + OH⁻(aq)

Adding NH₄⁺ to the equilibrium would result in an excess on the product side of the equation and initiate shift to the left until the new equilibrium is established.

Note: Think of the reaction as being on a seesaw, that is ...

NH₃(aq) + H₂O(l) ⇄ NH₄⁺(aq) + OH⁻(aq)

                           Δ

At equilibrium the seesaw is balanced, but when NH₄⁺ is added, the seesaw is tilted to the right b/c of excess NH₄⁺ and, by natural action, shifts left forming more NH₃ & H₂O in order to form a new balanced equilibrium. :-)

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms