CHP111 (18s) Circle one best answer in each multiple choice. (4 pt each) 1. What

Question

CHP111 (18s) Circle one best answer in each multiple choice. (4 pt each) 1. What species are present in the aqueous HCN solution? a) HCN; b) H', CN; c)H, CN, HCN; Exam 2 Name: d) H 2. What species are present in the aqueous Hl solution? a) HI; b) H', r; c) H', r, HI; d) H 3. Assign oxidation number of Cl in HCIO. a) 1, b) 3, c)5, d)-1. 4. Addition of NaOH to water makes the solution hot. This dissolution process is a) exothermic, b) endothermic, c) both, d) neither. The SI unit of pressure is a) atm, b) torr, c) bar, d) pascal. That a chemical reaction is exothermic refers to a) the forward reaction, b) the backward reaction, c) both directions, d) more enthalpies stored in products than those in reactants 5. 6. Identify each of the following compounds as acid (strong or weak), base (strong or weak), salt, electrolyte (strong or weak) or nonelectrolyte Compound Acid 7. Electrolyte (Non-, strong, or weak) Base Salt (strong or (strong or weak) weak) NH3 C12H22011 KBr 8. Write balanced (net) ionic equation for each following equation. And, find spectator io a) HClaq) + NaOH(aq) ? Nacl(aq) + H2O(l)

Explanation / Answer

(1)

The correct option is (C), because HCN is a weak acid so it will also be present in its aqueous solution.

(2)

The correct option is (C), because HI is a weak acid so it will also be present in its aqueous solution.

(3)

Oxidation number of Cl is +1 in HClO.

(4)

The dissolution process is exothermic because it involves release of heat.

(5)

SI unit of pressure is Pascal.

(6)

It refers to the forward direction.

Hope this helps !

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