Redox Reactions: Identifying and Understanding Chemical Transformations

In summary, the correct answer for the first question is E. None of the above. And the primary reason for the nonexistence of NaCl2 is that Na has a high second ionization energy.
  • #1
nothing123
97
0
Which of the following is a redox reaction?
A. TiCl4(g) + 2 Mg(l) D Ti(s) + 2 MgCl2(l)
B. NH3(g) + CO2(g) + H2O(l) NH4HCO3(aq)
C. NaCl(s) + NaHSO4(s) D HCl(g) + Na2SO4(s)
D. NaOH(aq) + H3PO4(aq) NaH2PO4(aq) + H2O(l)
E. None of the above

Is it A?

Also another q.
The primary reason for the nonexistence of NaCl2 is that:
A. Cl has a low electron affinity.
B. the Cl2
– ion has been observed only as a ligand in coordination complexes of transition metal ions.
C. NaCl2 would have very high lattice energy.
D. the expected repulsion between the Cl atoms is strong.
E. Na has a high second ionization energy.

I'm leaning towards E...
 
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  • #2
I would accept both answers, but that's me.
 
  • #3


Yes, A is the correct answer for the first question.

For the second question, the correct answer is C. NaCl2 would have very high lattice energy due to the strong electrostatic attraction between the Na+ and Cl- ions. The other options are not relevant to the nonexistence of NaCl2.
 

1. What is the difference between an element and a compound?

An element is a pure substance made up of only one type of atom. A compound is a substance made up of two or more elements that are chemically bonded together.

2. How do you calculate the molar mass of a compound?

To calculate the molar mass of a compound, you need to know the atomic mass of each element in the compound and the number of atoms of each element present. Multiply the atomic mass of each element by the number of atoms of that element, then add all of the results together to get the molar mass.

3. What is the difference between a physical change and a chemical change?

A physical change is a change in the appearance or physical properties of a substance, such as a change in state (solid, liquid, gas). A chemical change is when the chemical composition of a substance is altered, resulting in the formation of a new substance with different properties.

4. What is the difference between an exothermic and endothermic reaction?

An exothermic reaction releases heat energy, causing the surroundings to feel warmer. An endothermic reaction absorbs heat energy, causing the surroundings to feel cooler.

5. How do you balance a chemical equation?

To balance a chemical equation, you must ensure that the number of atoms of each element on the reactant side is equal to the number of atoms of that element on the product side. You can balance equations by adjusting the coefficient numbers in front of each compound or molecule.

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