Chemical Dominoes - Activity 4 Quiz

1. To stop a circuit from lighting, you must disrupt the flow of

Neutrons

Protons

Electrons

Moles

To stop a circuit from lighting, you must disrupt the flow of electrons. Electrons are negatively charged particles that carry the electrical current in a circuit. By interrupting the flow of electrons, such as by opening a switch or breaking the circuit, the circuit will be unable to complete its path and the light will not turn on. Neutrons and protons are particles found in the nucleus of an atom and are not directly involved in the flow of electricity. Moles, on the other hand, are a unit of measurement for the amount of substance and have no relevance to circuitry.

Explanation

To stop a circuit from lighting, you must disrupt the flow of electrons. Electrons are negatively charged particles that carry the electrical current in a circuit. By interrupting the flow of electrons, such as by opening a switch or breaking the circuit, the circuit will be unable to complete its path and the light will not turn on. Neutrons and protons are particles found in the nucleus of an atom and are not directly involved in the flow of electricity. Moles, on the other hand, are a unit of measurement for the amount of substance and have no relevance to circuitry.

2. Metals will lose electrons to form ______________ ions.

Negative

Positive

Neutral

Equal

Metals have a tendency to lose electrons to achieve a stable electron configuration, which results in the formation of positive ions. This process is known as oxidation, where metals undergo oxidation by losing electrons. Therefore, the correct answer is positive.

Explanation

Metals have a tendency to lose electrons to achieve a stable electron configuration, which results in the formation of positive ions. This process is known as oxidation, where metals undergo oxidation by losing electrons. Therefore, the correct answer is positive.

3. Pb³⁺ + Al(s) --> Pb(s) + Al³⁺ Al is _____________.

Oxidized

Reduced

Neutral

Acidic

In the given reaction, Pb3+ is reduced to Pb(s) while Al is oxidized to Al3+. This is because Pb3+ gains electrons and is reduced, while Al loses electrons and is oxidized. Therefore, the correct answer is oxidized.

Explanation

In the given reaction, Pb3+ is reduced to Pb(s) while Al is oxidized to Al3+. This is because Pb3+ gains electrons and is reduced, while Al loses electrons and is oxidized. Therefore, the correct answer is oxidized.

4. The solid is _____________ and ___________ electrons.

Oxidized, gains

Oxidized, loses

Reduced, gains

Reduced, loses

In this question, the solid is undergoing a process called oxidation, which involves the loss of electrons. When a substance is oxidized, it loses electrons, resulting in a positive charge. Therefore, the correct answer is "oxidized, loses."

Explanation

In this question, the solid is undergoing a process called oxidation, which involves the loss of electrons. When a substance is oxidized, it loses electrons, resulting in a positive charge. Therefore, the correct answer is "oxidized, loses."

5. In order for Hg and Pt to react, Hg will have to

Be the solid that is oxidized

The solid that is reduced

The aqueous that is oxidized

The aqueous that is reduced

Hg will have to be the solid that is oxidized because in a redox reaction, oxidation involves the loss of electrons, and the substance that is oxidized is called the reducing agent. Since Hg is being oxidized, it is losing electrons and acting as the reducing agent.

Explanation

Hg will have to be the solid that is oxidized because in a redox reaction, oxidation involves the loss of electrons, and the substance that is oxidized is called the reducing agent. Since Hg is being oxidized, it is losing electrons and acting as the reducing agent.

6. Electrons in a battery flow from

Positive to negative

Negative to positive

They don't flow

Cathode to anode

In a battery, electrons flow from the negative terminal (cathode) to the positive terminal (anode). This flow is due to the difference in charge between the two terminals. Electrons are negatively charged particles, so they are attracted to the positive terminal and repelled by the negative terminal. As a result, they move from the negative terminal to the positive terminal, creating an electric current.

Explanation

In a battery, electrons flow from the negative terminal (cathode) to the positive terminal (anode). This flow is due to the difference in charge between the two terminals. Electrons are negatively charged particles, so they are attracted to the positive terminal and repelled by the negative terminal. As a result, they move from the negative terminal to the positive terminal, creating an electric current.

7. Ca²⁺ions WILL react with

Magnesium(s)

Copper (s)

Potassium (s)

Silver (s)

Ca2+ ions will react with potassium (s) because potassium is more reactive than calcium. In a reaction, calcium will lose two electrons to form Ca2+ ions, while potassium will lose one electron to form K+ ions. Since potassium has a higher reactivity, it will displace calcium in a reaction and form a compound with the calcium ions. This reaction is known as a displacement reaction.

Explanation

Ca2+ ions will react with potassium (s) because potassium is more reactive than calcium. In a reaction, calcium will lose two electrons to form Ca2+ ions, while potassium will lose one electron to form K+ ions. Since potassium has a higher reactivity, it will displace calcium in a reaction and form a compound with the calcium ions. This reaction is known as a displacement reaction.

8. Nickel (s) will react with

Lithium (aq)

Zinc (aq)

Iron (aq)

Mercury (aq)

Nickel is a less reactive metal compared to lithium, zinc, iron, and mercury. It will not react with lithium, zinc, or iron as they are more reactive metals. However, nickel can react with mercury, as mercury is a more reactive metal. This reaction will result in the formation of a compound between nickel and mercury.

Explanation

Nickel is a less reactive metal compared to lithium, zinc, iron, and mercury. It will not react with lithium, zinc, or iron as they are more reactive metals. However, nickel can react with mercury, as mercury is a more reactive metal. This reaction will result in the formation of a compound between nickel and mercury.

9. 1. Given the balanced ionic equation: Zn(s) + Cu²⁺(aq) à Zn²⁺(aq) + Cu(s) Which equation represents the oxidation half-reaction?

Cu2+(aq) --> Cu(s) +2e-

Cu2+(aq) + 2e- -->Cu(s)

Zn(s) + 2e- --> Zn2+(aq)

Zn(s) --> Zn2+(aq) + 2e-

The equation Zn(s) --> Zn2+(aq) + 2e- represents the oxidation half-reaction because it shows the loss of electrons from the zinc atoms (Zn(s) to Zn2+(aq)). In this reaction, zinc is being oxidized, which means it is losing electrons and increasing its oxidation state. The electrons released during this reaction are shown on the right side of the equation.

Explanation

The equation Zn(s) --> Zn2+(aq) + 2e- represents the oxidation half-reaction because it shows the loss of electrons from the zinc atoms (Zn(s) to Zn2+(aq)). In this reaction, zinc is being oxidized, which means it is losing electrons and increasing its oxidation state. The electrons released during this reaction are shown on the right side of the equation.

10. 1. Given the redox reaction: Cr³⁺ + Al à Cr + Al³⁺ As the reaction takes place, there is a transfer of

Electrons from Al to Cr3+

Electrons from Cr3+ to Al

Protons from Al to Cr3+

Protons from Cr3+ to Al

In the given redox reaction, Cr3+ is being reduced to Cr, which means it is gaining electrons. On the other hand, Al is being oxidized to Al3+, which means it is losing electrons. Therefore, there is a transfer of electrons from Al to Cr3+ during the reaction.

Explanation

In the given redox reaction, Cr3+ is being reduced to Cr, which means it is gaining electrons. On the other hand, Al is being oxidized to Al3+, which means it is losing electrons. Therefore, there is a transfer of electrons from Al to Cr3+ during the reaction.