What is the chemical formula for hydrochloric acid? Write your answer on the whiteboard.
HCl
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10
What gas is produced as a result of the chemical reaction? HINT: The chemical formula is SO2.
Sulfur dioxide
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monster
Reset all scores!
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seesaw
Swap points!
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fairy
Take points!
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baam
Lose 5 points!
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seesaw
Swap points!
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rocket
Go to first place!
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fairy
Take points!
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baam
Lose 10 points!
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25
Debate time! Each team picks a representative. You are arguing the following topic: 'Should we replace this experiment with virtual simulations as a means to avoid inhaling gas irritants?' I will assign sides.
Whoever is most convincing wins.
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20
Spelling bee! You have to spell a word of my choice.
Hydrochloric acid
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10
What were the two reactants in our experiment?
Hydrochloric acid and Sodium thiosulfate
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25
Rap a verse about the Sodium Thiosulfate + Hydrochloric acid. (Must mention at least 3 relevant scientific facts i.e. Solid sulfur sediment, endothermic reactions, chemical changes, sulphur dioxide gas formation, colour change etc.)
Nice bars
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thief
Give points!
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gift
Win 25 points!
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gift
Win 15 points!
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banana
Go to last place!
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15
Draw a rough graph of your group's data on the whiteboard. Must include: scale (doesn't have to be perfect), axis titles and a trend line.
Points if graphed correctly.
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eraser
Reset score!
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shark
Other team loses 15 points!
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fairy
Take points!
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thief
Give points!
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15
POV: Your lab partner added water to the hydrochloric acid without you knowing. How would this affect your experiment?
The rate of reaction would slow down as there is a decreased concentration of HCl.
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15
A student completes the experiment but sees no solid sulphur form at the bottom of the test tube. Suggest two errors they may have made.
Using hydrochloric acid that is too diluted, the room was too cold, they used the wrong/contaminated/expired reagents, etc.
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15
A student stored their sodium thiosulfate on a hot windowsill for several days. Once it was time to perform the experiment, they found that the reactants acted strangely. Why might this be?
Heat can cause sodium thiosulfate to decompose or degrade over time, affecting its reactivity.
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15
What extensions could you make to the experiment to explore a new variable or phenomenon? Name two.
Different concentrations of hydrochloric acid, the effect of temperature on rate of reaction, test how cloudy the solution becomes (cross test) etc.
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15
What would happen to the rate of your reaction if you used ice cold hydrochloric acid?
The rate of reaction would slow down due to lower particle energy. (No heat to absorb, particles come into contact with each other less often)
