Answer to Question #347616 in General Chemistry for Toniece

Question

Question 5

Given then the following reactions below, which one involves neither oxidation nor reduction?

a. Cl₂ + H₂O → HCl + HOCl

b. 2Na + 2H₂O → 2NaOH + H₂

c. 3NO₂ + H₂O → 2HNO₃ + NO

d. POCl₃ + 3H₂O → H₃PO₄ + 3HCl

e. 2H₂O → 2H₂ + O₂

Question 6

Calculate the oxidation number of phosphorus in KH₂PO₄?

a. -6

b. -2

c. 0

d. +5

e. +6

 Question 7

Reactions which cannot occur spontaneously are called:

a. exothermic

b. endothermic

c. all reactions can occur spontaneously

d. no reactions can occur spontaneously

e. both [a] and [b]

Question 8

Calculate the number of moles of hydrogen atoms in one mole of (NH₄)₂SO₄.

a. 1

b. 2

c. 4

d. 8

e. 15

Answer 1

Solution:

Answer to the Question 5: d. POCl₃ + 3H₂O → H₃PO₄ + 3HCl

Answer to the Question 6: d. +5

Answer to the Question 7: b. endothermic

Answer to the Question 8: d. 8