Question 1

Which of the following statements correctly describes the formation of a Ca2+ ion from a neutral calcium atom?

Accepted Answer

The calcium atom loses two electrons, resulting in 20 protons and 18 electrons.

Question 2

Which of the following is the correct empirical formula for hydrogen peroxide?

Accepted Answer

HO

Question 3

What is the correct name for the ion with the formula Fe$$^{3+}$$?

Accepted Answer

Iron(III) ion

Question 4

Which of the following compounds is an ionic compound and why?

Accepted Answer

CaS; because it is formed from a metal cation and a non-metal anion.

Question 5

Which polyatomic ion is positively charged?

Accepted Answer

Ammonium ($$\mathrm{NH}_4^+)$$

Question 6

What is the correct name for the ion with the formula ClO$$_4^-$$?

Accepted Answer

Perchlorate

Question 7

Which of the following is the correct molecular formula for a compound whose empirical formula is CH$$_3O$_2$$ and whose experimentally determined molar mass is three times the empirical formula mass?

Accepted Answer

C$$_3H$_9O$_6$$

Question 8

Which of the following ions is formed when sulfur gains two electrons?

Accepted Answer

S$$^{2-} ($$sulfide ion)

Question 9

Which of the following is the correct name for the ion with the formula HPO$$_4$$^{2-}$$?

Accepted Answer

Hydrogen phosphate

Question 10

Which of the following acids has the greatest number of oxygen atoms?

Accepted Answer

Perchloric acid ($$\mathrm{HClO}_4)$$

Question 11

Which of the following is the correct formula for the nitrite ion?

Accepted Answer

$$\mathrm{NO}_2^-$$

Question 12

A compound is found to contain 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. What is the empirical formula of the compound?

Accepted Answer

CH$$_2O$$

Question 13

Which of the following is the correct name for the ion with the formula MnO$$_4^-$$?

Accepted Answer

Permanganate

Question 14

Which of the following is the correct formula for the dihydrogen phosphate ion?

Accepted Answer

$$\mathrm{H}_2\mathrm{PO}_4^-$$

Question 15

Which of the following is the correct name for the ion with the formula BrO$$_3^-$$?

Accepted Answer

Bromate

Question 16

Which of the following is the correct formula for the carbonate ion?

Accepted Answer

$$\mathrm{CO}_3$$^{2-}$$

Question 17

Which of the following is the correct name for the ion with the formula HSO$$_4^-$$?

Accepted Answer

Hydrogensulfate

Question 18

Which of the following is the correct formula for the chromate ion?

Accepted Answer

$$\mathrm{CrO}_4$$^{2-}$$

Question 19

Which of the following is the correct name for the ion with the formula ClO$$_2^-$$?

Accepted Answer

Chlorite

Question 20

Which of the following is the correct formula for the oxalate ion?

Accepted Answer

$$\mathrm{C}_2\mathrm{O}_4$$^{2-}$$

chapter 2 lec 2

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