Investigating chemical reactions lab report PDF

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Investigating Chemical Reactions

Ashley Lozano 10/11/2021

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Dat Data a Activity 1: Synthesis R Reaction eaction Dat Data aT Table able 1 Activity

Observations and Data

Synthesis reaction

Initial temperature of steel-wool = 20C, 5 Minutes = 25C, 10 Minutes = 24C. The steel wool with vinegar appears rusted, orange coloration in comparison to the other one.

Decompositio n reaction

When the yeast interacted with hydrogen peroxide it made something that looked like foam, making big bubbles and a lot of gas. I predict when putting a glowing and a flaming splint it will burst into flames. Turns out when I put each of the splints in they simply went out.

Singlereplacement reaction

Initially the magnesium strip made some bubbles, then when I inserted the flaming splint the fire extinguished.

Doublereplacement reaction

The solution bubbled for a minute, but later it stopped and I was able to see some baking soda sitting at the bottom of the cup. The glowing splint and flame turned off.

Combustion reaction

The test tube that was over the flame looked empty, with burn marks at the bottom of the tube and I think the gas from the baking soda and vinegar turned the flame of the candle off.

Precipitation reaction

The limewater didn’t seem to have a reaction.

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2 Activity

Observations and Data

Combustion reaction

The steel wool doesn’t really catch in fire like I thought it would, the individual wires get hot and turned orange, but nearly immediately went out and appeared burnt after.

1. Describe all of the signs that indicated a chemical reaction occurred.

Change in color, temperature etc. 2. Describe the temperature change that occurred during this reaction. Is

heat required or produced during the reaction? Heat would be created as soon as the temperature of the steel started raising 3. Describe any other changes that were observed in the steel wool. What

reaction might create such a change? There were some marks of something that looked like rust on the metal most likely because of a reaction of oxygen 4. Write a balanced equation for the reaction of the steel wool with oxygen.

Be sure to include heat energy in the reaction. 4Fe+3O22Fe2O3

Activity 2: Decomposition R Reaction eaction 5. What two gases could potentially be produced from decomposing

hydrogen peroxide? Which gas was actually produced? What non-gaseous product formed from the reaction? Oxygen and hydrogen, only O2 is produced, 2 moles of water were produced which is a liquid

6. Write a balanced equation for the decomposition of hydrogen peroxide.

2H2O22H2O+O2

Activity 3: Single-R Single-Replacement eplacement R Reaction eaction 7. What gases could potentially be produced from hydrochloric acid (HCl)?

Which gas was actually produced?

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3 Hydrogen and Chlorine could potentially be produced from HCl. Hydrogen was the gas that was actually produced 8. Why did the splint need to be tilted at a 45-degree angle?

To keep the gas in the test tube while we were putting the splint inside of it 9. a. Write a balanced equation for the reaction initiated by the burning

splint. 2H2(g)+O2(g)2H2(g) b. Classify the reaction initiated by the burning splint. Combustion reaction Write a balanced equation for the reaction of magnesium with hydrochloric acid. Mg(s)+2HCl(aq)MgCl2(aq)+H2

10.

Activity 4: Double-R Double-Replacement eplacement R Reaction eaction What is the name and molecular formula of the gas formed when baking soda was combined with vinegar, which you identified using flaming and glowing splints? Carbon dioxide CO2

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Write a balanced chemical equation for the double-replacement reaction that occurred when baking soda was combined with vinegar. NaHCO3+CH3COOHCO2+H2O+Na+CH3COO

12.

One of the two products of the reaction of baking soda and vinegar is carbonic acid (H2CO3), which immediately forms water and the gas you identified after exposure to the flaming and glowing splints. Write a balanced equation showing the decomposition of carbonic acid. H2CO3H2O+CO2

13.

Activity 5: Combustion R Reaction eaction Explain why water appeared on the inside of the glass test tube. It appears because it was a combustion reaction where hydro carbon burned with oxygen produced CO2 and water

14.

Write a balanced equation for the combustion reaction. CH4(g)+2O2(g)CO2(g)+2H2O(l)

15.

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Activity 6: Precipitation R Reaction eaction 16. Write a balanced equation for the precipitation reaction. Which product is the precipitate? AgNO3(aq)+NaCl(aq)= AgCl(s)+NaNO3 silver chloride or AgCl is the precipitate

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