AP Chem Topics 4.1 - 4.5

Which is the correct net ionic equation for the reaction of AgNO₃ and CaCl₂?

• Ca²⁺(aq) +  2Cl^- (aq) → CaCl(s)
• Ag⁺(aq)  +  Cl^- (aq) → AgCl(s)
• Ag +  Cl  →  AgCl
• Ag⁺  +  Ca²⁺   →Ag₂Ca (s)

Tags

NGSS.HS-PS1-7

What are the spectator ions in the reaction of sodium chloride with silver nitrate?

• silver and nitrate
• sodium and chloride
• sodium and nitrate
• silver and chloride

The particle diagram represents the products of a reaction. If each white atom is Hydrogen, each red atom is Oxygen, and each black one is Carbon, what may have been the reactants in this reaction?

• C₃H₈ + 5 O₂

• C₃H₈ + 6 O₂

• C₄H₁₀ + 5 O₂

• C₄H₁₀ + 6 O₂

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-3

If each yellow atom represents Sulfur, each black atom represents Carbon, and each red atom represents Oxygen and the products are CO₂ and SO₂, what are the most likely coefficients for this reaction?

• CS₂ + 3 O₂ --> CO₂ + SO₂

• CS₂ + 3 O₂ --> 2 CO₂ + SO₂

• CS₂ + 3 O₂ --> CO₂ + 2 SO₂

• CS₂ + 3 O₂ --> 2 CO₂ + 2 SO₂

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-2

Which of the following is the most substantial difference between physical and chemical changes?

• Physical changes represent the majority of what occurs in nature

• Physical changes involve the formation of usable compounds

• Chemical changes involve the breaking of actual bonds

• Chemical changes are the once we're tested on

Tags

NGSS.MS-PS1-4

The limiting reactant . . .

• slows the reaction down.
• is used up first.
• is the reactant that is left over.
• controls the speed of the reaction.

4NH₃ + 5O₂ --> 4NO + 6H₂O

How many Liters of NO are formed if 17.0g of ammonia react with 16.0g of oxygen at STP?

• 44.8 L

• 22.4 L

• 9.0 L

• 8.30 L

2Na + 2H₂O → 2NaOH+ H₂

How many grams of hydrogen are produced if 230 g of Na are reacted with excess water?

• 5.0 g

• 2.5 g

• 10 g

• 45 g

6Na + Fe₂O₃ --> 3Na₂O + 2Fe

If you are provided 230g of sodium (AM = 23 g mol^-1)and 320 grams of iron(III) oxide (MM = 160 g mol^-1), which is the limiting reagent?

• Na

• Fe₂O₃

• Na₂O

• Fe

Tags

NGSS.HS-PS1-7

CH₄ + 2O₂ → CO₂ + 2H₂O

24 grams of solid CH₄ was added to the above reaction with excess O₂. A student collected 58g of water at the end of the reaction. Is this possible? If not, what might have went wrong?

• It's possible

• He actually started with a larger mass of CH₄ than he wrote down

• He actually started with a smaller mass of CH₄ than he wrote down

• The student may have let too much of the water evaporate before massing the product

Tags

NGSS.HS-PS1-7