Test 10, Ch. 15 Flashcards
- Acid or base
Can accept a proton from another substance
Base
- Acid or base
Changes blue litmus paper to red
Acid
- Acid or base
Produces H3O+ in an aqueous solution
Acid
- Acid or base
Produces OH- in an aqueous solution
Base
- Acid or base
Can donate a proton to another substance
Acid
- Acid or base
Changes red litmus paper to blue
Base
- What is a solution in which the numbers of H3O+ and OH- ions are equal?
Neutral solution
- Which of the following is not a strong acid?
Acetic acid
- By which process do ions of some salts react with water molecules to produce OH- or H3O+ ions?
Hydrolysis
- What are substances such as litmus dye, phenolphthalein, and methyl violet?
Acid base indicators
- Which of the following statements best describes a strong acid?
It ionizes essentially 100% in aqueous solution
- What forms when a strong acid and a strong base react to neutralize each other?
Salt
- What gas is produced when an acid reacts with zinc metal?
Hydrogen
- What gas is produced when an acid reacts with calcium carbonate?
Carbon dioxide
- What forms when a Brønsted-Lowry base gains a proton?
Conjugate acid
- What are acids containing hydrogen, oxygen, and one other element called?
Oxyacids
- Which of the following is not a strong base?
Ammonia
Write name of compound as an acid
21. HBr
Hydrobromic acid
Write name of compound as an acid
22. H2S
Hydrosulfuric acid
Write name of compound as an acid
23. H3PO4
Phosphoric acid
Write name of compound as an acid
24. HF
Hydrofluoric acid
True/False
26. A solution that can maintain a relatively constant pH because it contains a weak acid and conjugate base or vice verse is a (buffer)
True
True/False
27. Gradually adding a standard solution to a measured volume of solution of unknown concentration until the reaction is complete is called (normalization).
False
Titration
True/False
28. The (Bronsted-Lowry) definition of acids and bases applies only to aqueous solutions.
False
Arrhenius concept
True/False
29. A solution containing more H3O+ ions than OH- ions is said to be (basic).
False
Acidic
True/False
30. An acid that can lose only one proton is said to be (diprotic).
False
Monoprotic acid
True/False
31. The stronger an acid, the (stronger) it’s conjugate base.
False
Weaker
True/False
32. If H2SO4 is diprotic and its molar mass is 98.08 g/mol, its equivalent mass must be (49.04 g/eq.
True
- True/False
The negative logarithm of [H3O] concentration in a given solution is the (pOH).
False
pH
- An ionic compound composed of any cation except H+ and any anion except OH- is called a (base).
False
Salt
- Which of the following statements best describes the reason for hydrogen’s prominent place in an activity series?
It is the gas evolved when an acid reacts with a metal
- What volume of 1 N NaOH solution could be completely neutralized by 100 ml.
200ml
- What is the conjugate base of H3PO4?
H2PO4
- Is a solution with a pH of 7 at 25 degrees celcious acidic, base or neutral?
Neutral
- Is a solution with a pH of 3.5 at 25 degrees celcious acidic, base or neutral?
Acidic
- What is the conjugate acid of NH3 ?
NH4
- Which of the following is a polyprotic acid?
H2SO4
- Calculate the pH of a 0.05 M solution of NaOH.
pH=-log(0.05)
=1.3
- 10.0 mL of a HF solution was titrated with a 0.120 N solution of KOH; 29.6 mL of KOH were required to completely neutralize the HF. Calculate the normality of the HF solution.
Molar mass: 20.006
———— = 2.006 = 2.0 N
Liters solution 10.0ml
Essay
Describe the titration process
The titration process is where the gradual addition of a standard solution to a measured volume of solution of unknown concentration until the reaction is complete or the volume of concentration has be neutralized or balanced.
Acid or base:
1. Has a sour taste when dissolved in water
Acid
