Acids and Bases
What type of intermolecular forces are predominantly present in a sample of liquid bromine (Br2)?
London dispersion forces
Ionic bonding
Hydrogen bonding
Dipole-dipole interactions
The approximate pH level of stomach acid for assisted digestion usually ranges around _________.
Between six and eight
Between one and three
Between two and five
Between nine and eleven
A 30.0 mL sample of 0.020 M HI is added to 95.0 mL of distilled water. What is the pH of the resulting solution?
1.02
1.69
2.52
2.32
Which formula represents the relationship between pH and pOH in an aqueous solution at room temperature?
pH / pOH = 10^-7
pH - pOH = 0
pH + pOH = 14
pH * pOH = 10^-14
What is the pH of a 0.00034 M solution of sodium hydroxide (NaOH)?
3.47
11.53
2.47
10.53
Which value represents neutral pH at standard temperature conditions?
.4
1.0
7
2.14
What is the pH of a 1 M solution of hydrochloric acid (HCl), a strong acid?
1
1
14
0

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A solution is formed by dissolving an antacid tablet and has a pH of 9.18. What is the H⁺?
3.3x10-10
1.01x10-10
9.4x10-10
6.6x10-10
Which value corresponds to neutral pH at standard temperature conditions?
7
9
0
14
What would be the expected effect on the equilibrium constant (Kc) for the reaction HA ⇽−−⇀ A− + H+, representing the dissociation of a strong acid in water, if the solvent temperature increased?
Kc is unchanged because Kc directly relates to the strength of the electrostatic interactions that do not vary with temperature.
The answer is incorrect as it implies that Kc must change when temperature rises when, in fact, Kc is unaffected by changes in temperature according to Le Châtelier's principle.
There is an increase in Kc because higher temperatures shift the reaction to the right side, favoring more products formation.
A decrease in Kc because temperature increase if the strength of hydrogen bonds within the products.