Unit 4 AP Chemistry

Which of the following represents the net ionic equation for the precipitation reaction between sodium carbonate and magnesium sulfate?

• Na₂CO₃ + MgSO₄ --> MgCO₃ + Na₂SO₄

• 2Na⁺ + CO₃^-2 + Mg⁺² + SO₄^-2 --> Mg⁺² + CO₃^-2 + 2Na⁺ + SO₄^-2

• 2Na⁺ + SO₄^-2 --> Na₂SO₄

• CO₃^-2 + Mg⁺² --> MgCO₃

Which of the following represents the net ionic equation for the precipitation reaction between sodium phosphate and lead (II) acetate?

• 2Na₃PO₄+ 3Pb(C₂H₃O₂)₂ --> Pb₃(PO₄)₂ + 6NaC₂H₃O₂

• 6Na⁺ + 2PO₄^-3 + 3Pb⁺² + 3C₂H₃O₂^-1 --> Pb₃(PO₄)₂ + 6NaC₂H₃O₂

• 2PO₄^-3 + 3Pb⁺² --> Pb₃(PO₄)₂

• Na⁺ + C₂H₃O₂^-1 --> NaC₂H₃O₂

Chemical or physical change? 2 H₂O(l) + O₂(g) → 2 H₂O₂(l)

• Chemical

• Physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Chemical or physical change? H₂O(l) → H₂O(g)

• Chemical

• Physical

Tags

NGSS.HS-PS3-4

Physical changes occur when...

• bonds are broken and formed

• a different phase appears in the product side

Chemical changes occur when...

• bonds are broken and formed

• a different phase appears in the product side

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which observation suggests a chemical change occurred?

• Change in total volume

• Change in temperature

• Change in total pressure

Tags

NGSS.MS-PS1-2

Which observation suggests a chemical change occurred?

• The mass stays constant

• The solution stays colorless

• A precipitate forms

Tags

NGSS.MS-PS1-2

Which observation suggests a physical change occurred?

• The shape of an object changed

• Color change

• Clear solutions turn cloudy

Boiling is an example of a __________

• Physical change because bonds are broken

• Physical change because IMFs are overcome

• Chemical change because bonds are broken

• Chemical change because IMFs are overcome