The following three solutions are mixed: 100.0mL of 0.100M Na₂SO₄, 50.0mL of 0.300M ZnCl₂, and 100.0mL of 0.200M Ba(CN)₂. Cyanide (CN-) solubilities are not in most tables, but Ba(CN)₂ is soluble, Zn(CN)₂ is not. a. What ionic compounds will precipitate out of solution? b. What is the molarity of each ion remaining in the solution, assuming complete precipitation of all insoluble compounds, and assuming that volumes are additive?
Answers
1. All sodium (Na+) salts are soluble, so Na₂SO₄ will remain in solution.
2. Zinc (Zn2+) salts are generally soluble, except for zinc sulfide (ZnS) and zinc hydroxide (Zn(OH)₂). However, in this case, we are adding ZnCl₂ to the solution, which contains chloride (Cl-) ions. Chloride ions form soluble salts with most cations, including Zn2+. Therefore, ZnCl₂ will remain in solution.
3. Barium (Ba2+) salts are generally soluble, except for barium sulfate (BaSO₄) and barium carbonate (BaCO₃). However, in this case, we are adding Ba(CN)₂ to the solution, which contains cyanide (CN-) ions. Cyanide ions form insoluble salts with most cations, including Ba2+. Therefore, Ba(CN)₂ will precipitate out of solution as Ba(CN)₂ is not soluble.
b. Assuming complete precipitation of all insoluble compounds and that volumes are additive, we can calculate the molarity of each ion remaining in the solution.
For Na₂SO₄:
- Sodium (Na+) ion concentration: 2 * 0.100 M = 0.200 M
- Sulfate (SO₄2-) ion concentration: 0.100 M
For ZnCl₂:
- Zinc (Zn2+) ion concentration: 0.300 M
- Chloride (Cl-) ion concentration: 2 * 0.300 M = 0.600 M
For Ba(CN)₂:
- Barium (Ba2+) ion concentration: 0.200 M
- Cyanide (CN-) ion concentration: 2 * 0.200 M = 0.400 M
Therefore, the molarity of each ion remaining in the solution, assuming complete precipitation of all insoluble compounds and that volumes are additive, are as follows:
- Sodium (Na+) ion: 0.200 M
- Sulfate (SO₄2-) ion: 0.100 M
- Zinc (Zn2+) ion: 0.300 M
- Chloride (Cl-) ion: 0.600 M
- Barium (Ba2+) ion: 0.200 M
- Cyanide (CN-) ion: 0.400 M
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2 mol H2 ----> 1 mol O2
x mol H2 -----> 6.28 mol O2
x = 6.28 * 2
x ≈ 12.6 mol
answer C
hope this helps!.
The correct answer is C. 12.6 mol~
(2) carbonate (4) peroxide
Answers
Carbonate ion contains the greatest number of oxygen atoms. So, the correct option is (2).
Polyatomic ion: refers to a charged chemical ion or species made up of two or more covalently joined atoms, or a metal complex that can be considered to behave as a single unit.
Acetate(C2H3O−) has two atoms of oxygen, carbonate has three oxygen atoms, hydroxide
has one, and peroxide (
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To know more about:-
Answer:
The correct answer is option 2, that is, carbonate.
Explanation:
A molecular ion, also known as a polyatomic ion, refers to a charged chemical ion or species comprising two or more atoms that are combined covalently, or of a complex of a metal, which can be regarded to be functioning as a single unit.
Of the given options, acetate has two atoms of oxygen, carbonate has three oxygen atoms, hydroxide has one, and peroxide has two atoms of oxygen. Thus, carbonate has the highest number of oxygen atoms.
Answers
(2) the beaker to the air
(3) the water to the ice cubes
(4) the water to the beaker
Answers
As the ice cubes should be at a temperature of about 0 degree ( freezing point) , at the same time the temperature of water is 24 degree. Thus, heat is transferred from water to ice cubes.
This is so because the ice cubes are colder compared to their surrounding objects.
They absorb the heat from the water, cooling it, therefore vanishing(melting).
Soil
Plants
Temperature
Answers
Answer:
The correct answer is ' plants'.
Explanation:
Abiotic factors : These are the non living physical and chemical parts of the environment that effects living organism and the ecosystem.For example: miner;as, soil, temperature, pressure etc.
Biotic factors: These are the living organisms which effects the functioning of the ecosystem and other living beings. For example: plants , animals, microorganism etc.
Final answer:
In an ecosystem, plants are not considered an abiotic factor, but a biotic factor since they are living organisms. Abiotic factors are non-living components such as minerals, soil, and temperature.
Explanation:
In an ecosystem, factors are broken down into two components: abiotic and biotic. Abiotic factors are the non-living components of an ecosystem, which include sunlight, temperature, wind patterns, soil, and minerals. On the other hand, biotic factors are the living components that interact with both the abiotic factors and other biotic factors. Examples of these include plants, animals, fungi, and bacteria.
In your given options, minerals, soil, and temperature are all examples of abiotic factors as they are all non-living components. However, plants are considered biotic factors as they are living organisms that directly interact with both the abiotic and biotic components of the ecosystem. Thus, the answer is plants.
Learn more about Abiotic and Biotic Factors here:
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John Smith
B)
John Winthrop
C)
Thomas Dale
D)
William Bradford
Answers
Answer: John winthrop
Explanation: