1. How many equivalents are in each of the following acids a. HCI b. HSO 2. Dete

Question

1. How many equivalents are in each of the following acids a. HCI b. HSO 2. Determine the Equivalent Weight of each the above acids. a. HCI b. H:504 3. What will be the normality of a solution of Ca(OH)2if its molarity is 3.00M? 4. Determine the whether the following reactions are exothermic or endothermic. a. H2 (g) + 12 (g) 2 HI (g) +52.96 kl b. CM (g) + 52 (g) 3 co, (g) + 4 Holl) 5. If i burn 22.0 grams of propane (Calt) in a bomb calorimeter containing 3.25 liters of water, what is the molar heat of combustion of propane if the water temperature rises 88.50 c? 6. Which color of visible light has... a. the shortest wavelength? b. the longest wavelength? c. the least amount of energy? d. the greatest amount of energy? " p.e

Explanation / Answer

1:

The equivalent mass of an acid is the amount that can donate one mole H+ .

One mole HCl gives one mole H+ ions.

HCl   -------> H+ + Cl-

So, the number of equivalent in HCl is 1.

One mole H2SO4 gives two moles of H+ ions.

H2SO4 ------> 2H+ + SO42-

So, the number of equivalents in H2SO4 is 2.

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