Answer:
See below.
Explanation:
a. The pH would decrease.
b. An acid.
c. The pH would increase.
d. A base. More accurately an alkali ( which is a soluble base).
Answer:
A)
Solution:
Adding a strong acid such as HCl to water results in the release of H+ ions.
Arrhenius Theory: An acid is a substance which produces one or more hydrogen ions, (H+) in aqueous solution.
Examples:
[tex]HCl(aq)>(aq)H^+Cl^-(aq)[/tex]
(H+) from the acid binds to neutral water molecules to form [tex]H_3O^+[/tex] raising the concentration of H+.
The resulting large concentration of (H+) makes the solution more acidic and leads to a dramatic drop in the pH.
B)
Solution :
An acid is a substance which produces one or more hydrogen ions, (H+) in aqueous solution.
Examples:
[tex]HCl(aq)>(aq)H^+Cl^-(aq)[/tex]
So, HCl is an acid.
C)
Solution :
A Base is a substance which produces one or more hydroxyl ion or hydroxide ion (OH-) in aqueous solution.
Examples :
[tex]KOH(s)> K^+(aq) +OH^-(aq)\\\\Ca(OH)_2(s)>Ca^{2+}(aq) +2OH^- (aq)\\\\Al(OH)_3(s)> Al^{3+}(aq)+ 3OH^- (aq)[/tex]
Please note: (aq) stands for aqueous which means in the presence of water that is, water acts as a solvent
The release of OH- ions makes the solution more basic and this leads to an increase in pH of the solution
D)
Solution:
A Base is a substance which produces one or more hydroxyl ion or hydroxide ion (OH-) in aqueous solution.
Examples
[tex]KOH(s)> K^+(aq) +OH^-(aq)\\\\Ca(OH)_2(s)>Ca^{2+}(aq) +2OH^- (aq)\\\\Al(OH)_3(s)> Al^{3+}(aq)+ 3OH^- (aq)[/tex]
Please note: (aq) stands for aqueous which means in the presence of water that is, water acts as a solvent
So, NaOH is a Base.
