Deck 4: Chemical Evidence

Question 1

Balance the equation for the reaction of silver nitrate with potassium phosphate to form silver phosphate and potassium nitrate. Write the reaction and the coefficients.

Answer 1

3AgNO₃ + K₃PO₄ → Ag₃PO₄ + 3KNO₃

Question 2

Assign the correct class name to each of the following reactions.

A) 2Fe + O₂ → 2FeO
B) BaCl₂(aq) + 2AgNO₃(aq) → 2AgCl(s) + Ba(NO₃)₂(aq)
C) 2Al + 6HCl → 2AlCl₃ + 3H₂

Answer 2

synthesis; metathesis - precipitation; redox - single displacement

Question 3

Is each of the following compounds a covalent compound or an ionic compound? Write the answer in the blank.

A) C₅H_{12 _____}
B) Fe(OH)_{3 _____}
C) HClO_{3 _____}
D) K₃PO_{4 _____}
E) (NH₄)₂SO_{4 _____}

Answer 3

covalent; ionic; covalent; ionic; ionic

Question 4

Which element, used in the production of transistors, is located in Period 5, Group 13?

A) In
B) Sn
C) Tl
D) Y

Question 5

Identify the best name for the compound AlCl₃, which is used in deodorants to prevent sweating.

A) aluminum chloride
B) aluminum trichloride
C) aluminum(III) chloride
D) monoaluminum trichloride

Question 6

Calculate the number of moles in 19.2 g of calcium chloride.

Question 7

Rank the following compounds in order from lowest melting point to highest melting point: CaF₂, MgO, NaCl

A) MgO < CaF₂ < NaCl
B) CaF₂ < NaCl < MgO
C) NaCl < MgO < CaF₂
D) MgO < NaCl < CaF₂
E) NaCl < CaF₂ < MgO

Question 8

Fill in the family name of each element.

A) calcium (Ca) _____
B) chlorine (Cl) _____
C) neodymium (Nd) _____
D) rubidium (Rb) _____
E) uranium (U) _____
F) xenon (Xe) _____

Question 9

Calculate the number of grams in 2.1 moles AlPO₄.

Question 10

Select the formula for the compound lead(II) chloride, which is used to make ceramics.

A) PbCl₂
B) Pb₂Cl
C) PbCl
D) Pb₂Cl₂

Question 11

Identify the formula for the compound calcium nitride, which is used as a source of the reactive nitride ion.

A) CaN
B) Ca₃N₂
C) CaNO₃
D) Ca(NO₃)₂

Question 12

Determine the theoretical yield of AgCl in grams that will be formed if 2.25 g of CuCl₂ react with 3.88 g AgNO₃, given the reaction CuCl₂(aq) + 2AgNO₃(aq) → Cu(NO₃)₂(aq) + 2AgCl(s).

Question 13

Calculate the number of moles in 16.1 g of NaBr.

Question 14

Given the reaction 2C₃H₈O + 9O₂ → 6CO₂ + 8H₂O, calculate the number of grams of carbon dioxide that will be produced when 15.4 g of oxygen reacts with excess C₃H₈O.

Question 15

Which of the following is NOT a naturally occurring diatomic molecule?

A) N₂
B) Cl₂
C) I₂
D) S₂
E) Br₂

Question 16

Name the compound Ca(C₂H₃O₂)₂, which is used to help prevent high blood phosphate levels in patients who are on dialysis.

A) calcium bi(dicarbon trihydride dioxide)
B) calcium acetate
C) calcium(II) acetate
D) calcium (dicarbon trihydride dioxide)

Question 17

Calculate the molar mass of dichlorine heptoxide.

Question 18

Name the compound Fe₂S₃, a compound produced as a by-product of desulfurization of fuel.

A) iron sulfite
B) iron sulfide
C) iron(III) sulfide
D) diiron trisulfide

Question 19

Identify the name for the compound SO₃, a precursor for sulfuric acid.

A) sulfur oxide
B) sulfur trioxide
C) sulfur(III) oxide
D) monosulfur trioxide

Question 20

Which of the following compounds is NOT a salt?

A) KI
B) CaCO₃
C) NH₄Cl
D) P₂O₅

Question 21

Write the formula for the compound dioxygen difluoride, an extremely strong oxidant.

Question 22

Calculate the number of grams in 14.02 moles carbon tetrachloride.

Question 23

Balance the equation for the combustion reaction of C₆H₁₄. Write the reaction and the coefficients.

Question 24

Balance the equation for the reaction of aluminum iodide with mercury(II) chloride to form aluminum chloride and mercury(II) iodide. Write the reaction and the coefficients.

Question 25

Given the reaction B₂H₆ + O₂ → HBO₂ + H₂O, calculate the number of grams of oxygen that will be needed to produce 2.5 moles of water.