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(1) How long did the splint burn before heating the sodium hydrogen carbonate?

Name: ________________ Section:
Report Form – Chemical Reactions
Part A–Combination (Synthesis) Reaction
Write down your observation.
What evidence was there of a chemical reaction?
Translate the following word equation for this reaction into a balanced chemical equation:
Magnesium metal(s) plus oxygen(g) yields magnesium oxide(s)
Balanced Chemical Equation: __________________________________________________________

Part B–Decomposition Reaction
(1) How long did the splint burn before heating the sodium hydrogen carbonate? ___
(2) How long did the splint burn after heating the sodium hydrogen carbonate? ____
Based on your observations of the flaming wood splint and the background information given on the first page of
this lab, complete the word equation below (i.e. what is the gas that forms?). Then turn this word equation into a
balanced chemical reaction.
Sodium hydrogen carbonate(s) → Sodium carbonate(s) + Water (l) + _________________ (g)
Balanced Chemical Equation: _________________________________________________________

Report Form – Chemical Reactions 2
PART C: Single Replacement Reactions (Watch Chemical Reactions YouTube Video from 1:50 – 3:34)
(1) Silver nitrate + copper wire.
Observations:
In this reaction, the copper and silver “swap” places. Based on this, write the two products that are forming in
this reaction. Then turn this word equation into a balanced chemical equation. (Note: Copper ends up with a +2
charge.)
Silver nitrate (aq) + Copper (s) → ______________________________________________
Balanced Chemical Equation:


Explain what you saw in your observations that matches this chemical equation:
(2) Magnesium + Hydrochloric Acid (HCl)
Observations: _____________________________________________________________________
Based on your observations of the flaming wood splint and the background information given on the first page of
this lab, complete the word equation below (i.e., what is the gas that forms?). Then turn this word equation into a
balanced chemical equation.
Hydrochloric Acid (aq) + Magnesium (s) → Magnesium Chloride (aq) + ______________(g)
Balanced Chemical Equation: _________________________________________________________
What two elements “swapped” places in this reaction? ____________________________________
(3) Calcium + Water
Observations: _____________________________________________________________________
Report Form – Chemical Reactions 3
Based on your observations of the flaming wood splint and the background information given on the first page of
this lab, complete the word equation below (i.e., what is the gas that forms?). Then turn this word equation into a
balanced chemical equation.
Water (l) + Calcium (s) → Calcium hydroxide (aq) + ______________(g)
Balanced Chemical Equation: _________________________________________________________
PART D: Precipitation Reactions (Watch the Chemical Reactions YouTube video from 4:50 – 7:00)
Record your observations for each reaction. If a precipitate formed, be sure to describe its color and texture
(chalky, cloudy, hazy, powdery, gel-like, etc.).
Write the balanced molecular equation (BME), complete ionic equation (CIE), and net ionic equation (NIE) for
each reaction you observed. If no reaction occurs write ‘NO REACTION’ for the net ionic equation. The (aq)
symbol should be included in the formula equation and NIE, but you do not have to include it in the complete
ionic equation. If your observation does not match your NIE, watch the reaction in the video again!
(1a) Silver nitrate (aq) + Potassium iodide (aq)
Observation: ______________________________________________________________________
BME:_______________________________________________________________________
CIE:______________________________________________________________________________


NIE:_____________________________________________________________________________
(1b) Silver nitrate (aq) + Sodium phosphate (aq)
Observation: ______________________________________________________________________
BME:_______________________________________________________________________
CIE:______________________________________________________________________________


NIE:_____________________________________________________________________________
Report Form – Chemical Reactions 4
For reaction 1b, draw pictures of ions in the beakers that shows what the CIE represents:
BEFORE THE REACTION AFTER THE REACTION
(2a) Zinc nitrate (aq) + Sodium carbonate (aq)
Observation: ______________________________________________________________________
BME:_______________________________________________________________________
CIE:______________________________________________________________________________


NIE:_____________________________________________________________________________
(2b) Zinc nitrate (aq) + Sodium phosphate (aq)
Observation: ______________________________________________________________________
BME:_______________________________________________________________________
CIE:______________________________________________________________________________


NIE:_____________________________________________________________________________
(3a) Aluminum nitrate (aq) + Potassium iodide (aq)
Observation: ______________________________________________________________________
Report Form – Chemical Reactions 5
3a continued :BME:_________________________________________________________________
CIE:______________________________________________________________________________


NIE:_____________________________________________________________________________
(3b) Aluminum nitrate (aq) + Sodium phosphate (aq)
Observation: ______________________________________________________________________
BME:_______________________________________________________________________
CIE:______________________________________________________________________________


NIE:_____________________________________________________________________________
(4) Nitric acid (aq) + Sodium hydroxide (aq)
How many drops of NaOH were needed to turn the phenolphthalein pink?_______
BME:_______________________________________________________________________
CIE:______________________________________________________________________________


NIE:_____________________________________________________________________________
(5) Sulfuric acid (aq) + Sodium hydroxide (aq)
How many drops of NaOH were needed to turn the phenolphthalein pink?_______
BME:_______________________________________________________________________
CIE:______________________________________________________________________________


NIE:_____________________________________________________________________________
Question: In Part D, #4 and #5 start with equal amounts of 0.1 M acids. Looking at the balanced chemical
reactions for these parts, why did the sulfuric acid need more sodium hydroxide to turn the phenolphthalein pink
than the nitric acid?

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