Electrolysis, Reactions of Metals & Acids -
Major Focus QUESTIONS AND ANSWERS
1. Copper nitrate solution is blue. Suggest why the blue coloration of the copper nitrate
solution fades at some point of the electrolysis - ANSWER-Copper ions are
discharged
2. Define yield - ANSWER-Percentage product out of expected product
3. Describe focused sturdy acid (2) - ANSWER-- Lots of acid ions
- They're completely ionised
4. Describe concentrated vulnerable acid (2) - ANSWER-- Lots of acid ions
- They're in part ionised
5. Describe dilute robust acid (2) - ANSWER-- Few acid ions
- They're absolutely ionised
6. Describe dilute susceptible acid (2) - ANSWER-- Few acid ions
- They're in part ionised
7. Describe what takes place at the negative electrode (three) - ANSWER-1. Ion will flow
to the poor electrode
2. Ion will advantage electrons
three. Reduced to shape steel or hydrogen
8. Dilute hydrochloric acid is a strong acid. Explain why an acid can be both robust and
dilute (2) - ANSWER-- Strong because Hydrogen ions are completely ionised
- Dilute because now not lots acid according to unit of extent
9. Explain how oxygen gasoline is produced inside the electrolysis of sodium sulfate
answer (three) - ANSWER-1. Water molecules smash down to produce OH- ions
2. The ions are interested in the fantastic electrode
three. The ions are oxidised (lose electrons)
10.Explain why carbon may be used to extract nickel from nickel oxide (2) - ANSWER-1.
Carbon is more reactive than nickel
2. Carbon can displace nickel from nickel oxide
11.Explain why the reaction among magnesium atoms and zinc ions is both oxidation and
discount (2) - ANSWER-1. Oxidation because Mg loses electrons
2. Reduction due to the fact Zinc profits electrons
12.Give 2 observations the pupil could make whilst magnesium reacts with hydrochloric
acid - ANSWER-1. Bubbles
2. Magnesium dissolves
13.Give 2 motives why a response including neutralisation might not provide one hundred%
of the predicted yield - ANSWER-1. Loss of reactants
2. Not most efficient conditions
14.How are factors greater reactive than carbon extracted from their ores? -
ANSWER-Electrolysis
, 15.How are metals much less reactive than carbon extracted from their ores? -
ANSWER-Reduction with carbon
16.How are silver and gold extracted? - ANSWER-Mined from the Earth's crust
17.How can ionic substances be electrolysed? - ANSWER-By melting or dissolving
them, and then passing an immediate current thru them
18.How can metals be ordered by their reactivity? - ANSWER-By evaluating their
reactions with water, acid, or oxygen
19.How can you acquire a stable salt from an answer? - ANSWER-Crystallisation
20.How do you measure the pH of a substance? - ANSWER-Universal indicator or pH
probe
21.How is the quantity of H+ ions in an answer associated with its pH? - ANSWER-The
extra H+ ions, the decrease the pH
22.In electrolysis of solutions, whilst is the steel not produced at the poor electrode? -
ANSWER-When the steel is extra reactive than hydrogen
23.In terms of electrons, what's oxidation? - ANSWER-Loss of electrons
24.In phrases of electrons, what is reduction? - ANSWER-Gain of electrons
25.In terms of electrons, what makes some metals greater reactive than others? -
ANSWER-They lose their outer shell electron(s) greater easily
26.In phrases of H+ ions, what's an acid? - ANSWER-A substance that releases H+ ions
when dissolved in water
27.In terms of oxygen, what's oxidation? - ANSWER-Addition of oxygen
28.In phrases of oxygen, what is discount? - ANSWER-Removal of oxygen
29.In phrases of pH, what is a impartial solution? - ANSWER-A solution with a pH of
seven
30.In phrases of pH, what's an acid? - ANSWER-A answer with a pH much less than 7
31.In the electrolysis of a metal halide solution, what's produced on the effective electrode?
- ANSWER-Halogen
32.In the electrolysis of a steel sulfate answer, what's produced at the tremendous
electrode? - ANSWER-Oxygen
33.In the electrolysis of aluminium oxide, what are the positive electrodes fabricated from? -
ANSWER-Graphite
34.In the electrolysis of aluminium oxide, why do the effective electrodes need to be
replaced? - ANSWER-They react with the oxygen being formed
35.In the electrolysis of aluminium oxide, why is the aluminium oxide mixed with cryolite? -
ANSWER-To lower the melting factor
36.Name the salt produced while ammonia reacts with hydrochloric acid -
ANSWER-Ammonium chloride
37.Outline one protection problem while the usage of acids, and state a way to minimise the
chance (2) - ANSWER-- Corrosion/burns
- Use of PPE (goggles/gloves)
38.State and give an explanation for a way of setting up whether a reaction involving the
integration of an acid and an alkali has been finished (2) - ANSWER-- Titration the
usage of phenolphthalein indicator
- Pink to colourless
Major Focus QUESTIONS AND ANSWERS
1. Copper nitrate solution is blue. Suggest why the blue coloration of the copper nitrate
solution fades at some point of the electrolysis - ANSWER-Copper ions are
discharged
2. Define yield - ANSWER-Percentage product out of expected product
3. Describe focused sturdy acid (2) - ANSWER-- Lots of acid ions
- They're completely ionised
4. Describe concentrated vulnerable acid (2) - ANSWER-- Lots of acid ions
- They're in part ionised
5. Describe dilute robust acid (2) - ANSWER-- Few acid ions
- They're absolutely ionised
6. Describe dilute susceptible acid (2) - ANSWER-- Few acid ions
- They're in part ionised
7. Describe what takes place at the negative electrode (three) - ANSWER-1. Ion will flow
to the poor electrode
2. Ion will advantage electrons
three. Reduced to shape steel or hydrogen
8. Dilute hydrochloric acid is a strong acid. Explain why an acid can be both robust and
dilute (2) - ANSWER-- Strong because Hydrogen ions are completely ionised
- Dilute because now not lots acid according to unit of extent
9. Explain how oxygen gasoline is produced inside the electrolysis of sodium sulfate
answer (three) - ANSWER-1. Water molecules smash down to produce OH- ions
2. The ions are interested in the fantastic electrode
three. The ions are oxidised (lose electrons)
10.Explain why carbon may be used to extract nickel from nickel oxide (2) - ANSWER-1.
Carbon is more reactive than nickel
2. Carbon can displace nickel from nickel oxide
11.Explain why the reaction among magnesium atoms and zinc ions is both oxidation and
discount (2) - ANSWER-1. Oxidation because Mg loses electrons
2. Reduction due to the fact Zinc profits electrons
12.Give 2 observations the pupil could make whilst magnesium reacts with hydrochloric
acid - ANSWER-1. Bubbles
2. Magnesium dissolves
13.Give 2 motives why a response including neutralisation might not provide one hundred%
of the predicted yield - ANSWER-1. Loss of reactants
2. Not most efficient conditions
14.How are factors greater reactive than carbon extracted from their ores? -
ANSWER-Electrolysis
, 15.How are metals much less reactive than carbon extracted from their ores? -
ANSWER-Reduction with carbon
16.How are silver and gold extracted? - ANSWER-Mined from the Earth's crust
17.How can ionic substances be electrolysed? - ANSWER-By melting or dissolving
them, and then passing an immediate current thru them
18.How can metals be ordered by their reactivity? - ANSWER-By evaluating their
reactions with water, acid, or oxygen
19.How can you acquire a stable salt from an answer? - ANSWER-Crystallisation
20.How do you measure the pH of a substance? - ANSWER-Universal indicator or pH
probe
21.How is the quantity of H+ ions in an answer associated with its pH? - ANSWER-The
extra H+ ions, the decrease the pH
22.In electrolysis of solutions, whilst is the steel not produced at the poor electrode? -
ANSWER-When the steel is extra reactive than hydrogen
23.In terms of electrons, what's oxidation? - ANSWER-Loss of electrons
24.In phrases of electrons, what is reduction? - ANSWER-Gain of electrons
25.In terms of electrons, what makes some metals greater reactive than others? -
ANSWER-They lose their outer shell electron(s) greater easily
26.In phrases of H+ ions, what's an acid? - ANSWER-A substance that releases H+ ions
when dissolved in water
27.In terms of oxygen, what's oxidation? - ANSWER-Addition of oxygen
28.In phrases of oxygen, what is discount? - ANSWER-Removal of oxygen
29.In phrases of pH, what is a impartial solution? - ANSWER-A solution with a pH of
seven
30.In phrases of pH, what's an acid? - ANSWER-A answer with a pH much less than 7
31.In the electrolysis of a metal halide solution, what's produced on the effective electrode?
- ANSWER-Halogen
32.In the electrolysis of a steel sulfate answer, what's produced at the tremendous
electrode? - ANSWER-Oxygen
33.In the electrolysis of aluminium oxide, what are the positive electrodes fabricated from? -
ANSWER-Graphite
34.In the electrolysis of aluminium oxide, why do the effective electrodes need to be
replaced? - ANSWER-They react with the oxygen being formed
35.In the electrolysis of aluminium oxide, why is the aluminium oxide mixed with cryolite? -
ANSWER-To lower the melting factor
36.Name the salt produced while ammonia reacts with hydrochloric acid -
ANSWER-Ammonium chloride
37.Outline one protection problem while the usage of acids, and state a way to minimise the
chance (2) - ANSWER-- Corrosion/burns
- Use of PPE (goggles/gloves)
38.State and give an explanation for a way of setting up whether a reaction involving the
integration of an acid and an alkali has been finished (2) - ANSWER-- Titration the
usage of phenolphthalein indicator
- Pink to colourless
