Chapter 4 teachback

Balance: ___NaClO3→___NaCl +___O2

• I don't know

• 2NaClO3 → 2NaCl + 3O2

• 3NaClO3 → 2NaCl + 1O2

• 4NaClO3 → 1NaCl + 3O2

Tags

NGSS.HS-PS1-7

Balance: ___Al +___O2→___Al2O3

• 4Al + 3O2 → 2Al2O3

• 5Al + 3O2 → 2Al2O3

• 4Al + 3O2 → 2Al2O3

• 4Al + 1O2 → 2Al2O3

Tags

NGSS.HS-PS1-7

Write a chemical equation that represents NaBr(s) dissociating in water.

• Yeah sure

• NaBr(s) → H2O Na+ (aq) + Br- (aq)

• NaBr(s) → H2O Na+ (aq) + Br- (aq)

• NaBr(s) → H2O Na+ (aq) + Br- (aq)

Tags

NGSS.HS-PS1-7

Which is a composition reaction and which is not?

a. NaCl + AgNO3 → AgCl + NaNO3

b. CaO + CO2 → CaCO3

• Chemistry is cool!

• a. composition

  b. not composition

• a. not composition

  b. composition

• Chemistry is fun!

Tags

NGSS.MS-PS1-1

Is the reaction

2K(s) + Br2(ℓ) → 2KBr(s)

an oxidation-reduction reaction?

yes or no?

Balance: ___N2+___H2→___N2H4

• 1N2+4H2 →N2H5

• 
  N2+4H2 →N2H4

• N3+4H3 →N2H4

• N2+4H2 →N2H1000

Tags

NGSS.HS-PS1-7

9. Which is a combustion reaction and which is not?

a. C6H12O6 + 6O2 → 6CO2 + 6H2O

b. 2Fe2S3 + 9O2 → 2Fe2O3 + 6SO2

• a. combustion

  b. combustion

• a. not combustion

  b. combustion

• a. combustion

  b. not combustion

• how are you guys?

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Which is a decomposition reaction and which is not?

a. Na2O + CO2 → Na2CO3

b. H2SO3 → H2O + SO2

• Stop picking these or don't

• a. not decomposition

  b. not decomposition

• a. decomposition

  b. decomposition

• a. not decomposition

  b. decomposition

Write a balanced chemical equation for the neutralization reaction between

each given acid and base. Include the proper phase labels.

a. HI(aq) + KOH(aq) →

• a. HI(aq) + KOH(aq) → KI(aq) + H2O(ℓ)

• a. HI(aq) + 2KOH(aq) → 5KI(aq) + H2O(ℓ)

Tags

NGSS.MS-PS1-5

Identify what is being oxidized and reduced in this redox equation by assigning

oxidation numbers to the atoms.

2NO + Cl2 → 2NOCl

• Cl is being oxidized, and N is being reduced.

• N is being oxidized, and Cl is being reduced.

• N is being reduced, and Cl is being reduced.

• You doing good so far?

Tags

NGSS.HS-PS1-2