Orange Tornado

Orange Tornado

Assessment

Interactive Video

Science, Chemistry, Physics

6th - 12th Grade

Hard

Created by

Quizizz Content

FREE Resource

The video tutorial demonstrates a precipitation reaction using mercury chloride and potassium iodide solutions. It explains the setup and observation of the reaction, where an orange precipitate forms and vanishes. The chemical process involves the dissociation of salts into ions, leading to the formation of mercury iodide and a secondary reaction producing potassium Tetraioda mercurate. The tutorial also highlights the application of precipitation reactions in water treatment to remove toxic ions.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is required to demonstrate a precipitation reaction?

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