for the final step of the copper cycle, zinc, Zn(s), is added to copper sulfate, CuSO4(aq). Elemental copper appears as a solid.
1 answer:
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<u>Answer:</u>
<u>For 1:</u> The correct answer is False.
<u>For 2:</u> The correct answer is True.
<u>For 3:</u> The correct answer is True.
<u>For 4:</u> The correct answer is False.
<u>For 5:</u> The correct answer is True.
<u>Explanation:</u>
Net ionic equation of any reaction does not include any spectator ions. If no net ionic equation is formed, it is said that no reaction has occurred.
Spectator ions are defined as the ions which does not get involved in a chemical equation. They are found on both the sides of the chemical reaction when it is present in ionic form. Solids, liquids and gases do not exist as ions.
- <u>For 1:</u> Lead(II) nitrate and sodium chloride
The chemical equation for the reaction of lead (II) nitrate and sodium chloride is given as:
Ionic form of the above equation follows:
As, sodium and nitrate ions are present on both the sides of the reaction. Thus, it will not be present in the net ionic equation and are spectator ions.
The net ionic equation for the above reaction follows:
Hence, the correct answer is False.
- <u>For 2:</u> Sodium bromide and hydrochloric acid
The chemical equation for the reaction of sodium bromide and hydrochloric acid is given as:
Ionic form of the above equation follows:
There are no spectator ions in the equation. So, the above reaction is the net ionic equation.
Hence, the correct answer is True.
- <u>For 3:</u> Nickel (II) chloride and lead(II) nitrate
The chemical equation for the reaction of lead (II) nitrate and nickel (II) chloride is given as:
Ionic form of the above equation follows:
As, nickel and nitrate ions are present on both the sides of the reaction. Thus, it will not be present in the net ionic equation and are spectator ions.
The net ionic equation for the above reaction follows:
Hence, the correct answer is True.
- <u>For 4:</u> Magnesium chloride and sodium hydroxide
The chemical equation for the reaction of magnesium chloride and sodium hydroxide is given as:
Ionic form of the above equation follows:
As, sodium and chloride ions are present on both the sides of the reaction. Thus, it will not be present in the net ionic equation and are spectator ions.
The net ionic equation for the above reaction follows:
Hence, the correct answer is False.
- <u>For 5:</u> Ammonium sulfate and barium nitrate
The chemical equation for the reaction of ammonium sulfate and barium nitrate is given as:
Ionic form of the above equation follows:
As, ammonium and nitrate ions are present on both the sides of the reaction. Thus, it will not be present in the net ionic equation and are spectator ions.
The net ionic equation for the above reaction follows:
Hence, the correct answer is True.
<h2>Answer:</h2><h2>The percentage of the family’s total annual electricity that is used to run the two air conditioners for the three summer months = 19.4 %</h2>
Explanation:
Average electricity consumed per month = 900 kWh
The family cools their house for three months during the summer with two window-unit air conditioners
The power consumed by one window-unit air conditioners = 350 kWh
The power consumed by two window-unit air conditioners = 350(2) = 700 kWh
Power consumed for two air conditioners for the three summer months = 700 (3) = 2100 kWh
Total power consumed for 1 year = 900 (12) = 10800kWh
The percentage of the family’s total annual electricity that is used to run the two air conditioners for the three summer months = = 19.4 %