Question

question 1 (5 points)
an acid will have a ph < 7.
o a) true
o b) false
question 2 (5 points)
there is no relationship between ph and ka.
o a) true
o b) false
question 3 (5 points)
acids cannot exist in equilibrium.
o a) true

Explanation:

• Question 1: By definition, acids have a pH less than 7. Bases have a pH greater than 7, and a pH of 7 is neutral.
• Question 2: The pH of a weak - acid solution is related to its \(K_a\) (acid - dissociation constant). For a weak acid \(HA

ightleftharpoons H^{+}+A^{-}\), \(K_a=\frac{[H^{+}][A^{-}]}{[HA]}\), and \(pH =-\log[H^{+}]\). So, there is a relationship between pH and \(K_a\).

• Question 3: Weak acids exist in equilibrium. For example, acetic acid (\(CH_3COOH\)) in water has the equilibrium \(CH_3COOH

ightleftharpoons CH_3COO^{-}+H^{+}\). Strong acids are considered to dissociate completely in water (but in reality, there is a very small reverse reaction, and they also approach an equilibrium state in a more complex sense when considering the solvent - acid interactions at a very high level of detail).

Answer:

• Question 1: a) True
• Question 2: b) False
• Question 3: b) False