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Homework and Review Questions

Question 1

• Examine the contents of the vials and their labels. Write down at least six patterns you notice. Example: Every substance with the word sodium on it also has the symbol Na.

Question #2

Which elements have the following symbols-

A) Na B) OC) Cu D) ZnE) S F) CG) N H) H

Question 3

• How would you translate the following words into chemical symbols?

• Sulfate• Nitrate• Hydroxide

Question 4

• What do you think g, l, and s in parentheses stand for?

Question 5

• How would you write the chemical formula for ice?

Question 6

• What do all the substances labeled (aq) have in common?

Question 7

Imagine you find a vial in the chemistry stockroom that is labeled Cu2SO4 (aq).

What would you expect to see inside the vial?

Question 8

Potassium iodide, KI (aq), is added to lead nitrate, Pb(NO3)2 (aq), resulting in KNO3 (aq) and a yellow solid. Identify the yellow solid from the list below. Explain your thinking.

a. PbI2(aq)

b. PbI2 (s)

c. Pb(NO3)2 (s)

d. KI(s)

Question 9

CaCl2 (s) is an example of

(A)an aqueous solution(B) an element(C) a metal(D) a compound

Question 10

In a solution of silver nitrate, Ag (NO3)2 (aq) , water is the

(A)solute(B) solvent(C) solution(D) element

Question 11

The correct way to represent a solution of copper nitrate is

(A)Cu (s)(B) Cu (aq) (C) Cu(NO3)2 (s)

(D) Cu(NO3)2 (aq)

Question 12

Suppose you pour nitric acid on some copper powder in a test tube. A brown gas is produced, and some light blue liquid is left in the test tube. There is no solid remaining. What happened to the copper?

(A) It escaped in the brown gas.(B) It was destroyed by the acid.(C) It is now in the light blue liquid in compound form.(D) It is now in the light blue liquid as an element.

Question 13

The symbol (s) stands for

(A)solid(B) aqueous(C) solution(D)gas

Question 14

If you saw a container of NaCl (aq) in a lab, what would you see?

(A)solid (B) liquid (C) gas (D) nothing

Question 15

If you saw a container of NaCl (s) in a lab, what would you see?

(A)solid (B) liquid (C) gas (D) solution

Question 16

• How many elements are represented by the chemical formula for sodium nitrate, NaNO3?

• Name them

Question 17

What is the difference between CuSO4 (s) and CuSO4 (aq) ?

Question 18

• If salt NaCl (s) is dissolved in water, Hs0 (l), how would you write the chemical formula for the resulting salt water solution?

Question 19

• What is the solvent and what is the solute in a salt-water solution?