Evidence of a Reaction
Vocabulary
Balancing
Types of Reaction
Predicting Products
100
A student dissolves a salt in water for a lab. This is....
What is NOT evidence of a chemical reaction?
100
(s)
What is solid?
100
H2 (g) + O2 (g) --> H2O (g)
What is 2H2O (g) + O2 (g) --> 2H2O (g)?
100
C3H8 (l) + 5O2 (g) --> 3CO2 (g) + 4H2O (g)
What is combustion?
100
Predict products for the synthesis reaction: Al + S -->
What is Al2S3?
200
A student drops a piece of Mg metal into a beaker of HCl solution. He notices bubbles forming on the metal. The type of evidence of a reaction.
What is forming bubbles?
200
(aq)
What is aqueous, dissolved in water solution?
200
Ca (s) + Fe(NO3)3 (aq) --> Fe (s) + Ca(NO3)2 (aq)
What is 3Ca (s) + 2Fe(NO3)3 (aq) --> 2Fe (s) + 3Ca(NO3)2 (aq)?
200
NH4NO3 (aq) --> N2O (g) + 2H2O (l)
What is decomposition?
200
Predict products for the decomposition reaction: P2O5 -->
What is P + O2?
300
You want some sweet tea so you grab a pitcher from the fridge. You notice some sugar sitting in the bottom of the pitcher. Is this evidence of a chemical reaction?
What is NO?
300
reactant
What is a starting substance in a reaction?
300
AgNO3 (aq) + BaCl2 (aq) --> AgCl (s) + Ba(NO3)2 (aq)
What is 2AgNO3 (aq) + BaCl2 (aq) --> 2AgCl (s) + Ba(NO3)2 (aq)
300
2Al (s) + 3H2SO4 --> 3H2 (g) + Al2(SO4)3 (aq)
What is single - replacement?
300
Predict products for the double - replacement reaction: CaCl2 + GaPO3 -->
What is Ca3(PO3)2 + GaCl3?
400
A student mixes some yellow KI solution with blue CuSO4 solution and an ivory colored solid forms and settles to the bottom of the beaker. The 2 pieces of evidence a reaction occurred are....
What are color change and precipitation?
400
single - replacement
What is when a pure element replaces a similar element in a compound?
400
Al2O3 (s) + Fe (l) --> Fe3O4 (s) + Al (l)
What is 4Al2O3 (s) + 9Fe (l) --> 3Fe3O4 (s) + 8Al (l)?
400
Al2(SO4)3 (aq) + 6NaOH (s) --> 2Al(OH)3 (s) + 3Na2SO4 (aq)
What is doube - replacement?
400
Predict products for the single - replacement reaction: K + MgCO3 -->
What is Mg + K2CO3?
500
While camping in the woods on a cold night, you build a campfire near your tent. Sitting near the entrance to the tent, under a tarp, you suddenly feel water dripping onto your neck. You look up and see water drops on the tarp. The piece of evidence you have that a campfire is a chemical reaction is....
What is formation of water?
500
precipitate
What is a solid formed when 2 solutions react?
500
C6H6 (l) + O2 (g) --> CO2 (g) + H2O (g)
What is 2C6H6 (l) + 15O2 (g) --> 12CO2 (g) + 6H2O (g)?
500
Sr(OH)2 (s) + 2HNO3 (aq) --> Sr(NO3)2 (aq) + H2O (l)
What is acid - base?
500
Predict products for the acid - base reaction: HCl + Pb(OH)2 -->
What is H2O + PbCl2?
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