I think it is carbon dioxide
11. a. Amphoteric
12. a. NH₄⁺, H₂O
Explanation:
11. A substance that can act as either an acid or a base is said to be <u>amphoteric</u>.
Water is an amphoteric substance because it can reaction with either and acid or a base.
HCl + H₂O → Cl⁻ + H₃O⁺
NH₃ + H₂O → NH₄⁺ + OH⁻
12. What are the acids in the following equilibrium reaction?
NH₃ (aq) + H₂O (l) → NH₄⁺ (aq) +OH⁻ (aq)
H₂O water is acid 1
NH₄⁺ ammonium ion is acid 2
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amphoteric substances
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Answer:
22.01J/Kmol
Explanation:
The parameters given in this question are;
Enthalpy (H) = 6.01 kJ/mol.
Number of moles = 1
Entropy change (S) = ?
The formular relationship between entropy and enthalpy is given as;
ΔS=ΔH/T
Temperature for water at freezing point = 0C + 273 = 273 K (converting to Kelvin)
ΔS = 6.01/273
ΔS = 0.0220kJ/Kmol
ΔS = 0.02201 * 1000 = 22.01J/Kmol
Answer: A) Na+ and O2-
Explanation:
To know the electronic configuration, one has to determine the numbers of electrons present in each atom.
Na+ means a sodium atom that has lost one valence electron. A Sodium atom initially has 11 electrons, but having lost an electron making it 10 electrons remaining with electron configuration of 1s2 2s2 2p6.
O2- means oxygen atom that has gained two valence electrons. An oxygen atom initially has 8 electrons, having gained two electrons makes it 10 electrons with electron configuration of 1s2 2s2 2p6. same as Na+
The purpose of gaining or losing electrons is to attain a stable duplet or octet structure.
Answer:
The chemical reaction is a Double Displacement
Explanation:
Balance the reaction of KOH + AlCl3 = KCl + Al(OH)3
