What is required to demonstrate a precipitation reaction?
Orange Tornado

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Science, Chemistry, Physics
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6th - 12th Grade
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Copper sulfate, zinc, and a thermometer
Iron filings, sulfur, and a magnet
Mercury chloride, potassium iodide, and a magnetic stirrer
Sodium chloride, water, and a heater
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when mercury chloride is added to the vortex of potassium iodide solution?
A blue precipitate forms and remains
An orange precipitate forms and then vanishes
No visible change occurs
The solution turns green
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of using a magnetic stirrer in the demonstration?
To heat the solution
To create a vortex for clear observation
To cool the solution
To change the color of the solution
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What ions are formed when potassium iodide and mercury chloride dissolve in water?
Only mercury ions
Only potassium ions
Potassium, iodide, and mercury ions
Chloride and iodide ions
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What compound is formed when excess ions react with mercury iodide precipitate?
Potassium Tetraioda mercurate
Mercury sulfate
Sodium iodide
Potassium chloride
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the color of the compound potassium Tetraioda mercurate?
Orange
Blue
Colorless
Green
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do water treatment plants use precipitation reactions?
To increase water temperature
To dissolve toxic ions
To form solids that can be filtered out
To add minerals to water
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