what characteristic properties do buffered solutions possess?

(select all that apply.)

a solution is buffered by the presence of the combination of a strong acid and its conjugate base.

the solution shows only a small change in its ph when a strong acid or base is added.

the solution resists change in its ph only when a weak acid or base is added to it.

the solution shows significant change in its ph when any acid or base is added.

The solution shows only a small change in its pH when a strong acid or base is added and the solution resists change in its pH only when a weak acid or base is added to it are the characteristic properties the buffered solutions possess.

Options B and C

Explanation:

A solution is precipitated by the presence of weaker acid and its joint base (or vice versa). Buffer solutions are used to maintain the pH level of a chemical reaction at a constant level.

The solution shows only a small change in its pH when small amount of strong base or acid is added. Solutions resist any change in its pH when a weak base or acid is added. The buffer solution's pH is affected only when a certain concentration of bases or acids is added.

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2