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Solubility of Magnesium Phosphate

Solubility of Magnesium Phosphate

Assessment

Interactive Video

•

Chemistry

•

9th - 10th Grade

•

Practice Problem

•

Hard

Created by

Emma Peterson

FREE Resource

The video discusses the solubility of magnesium phosphate (Mg3(PO4)2) in water, concluding that it is insoluble. This is determined through memorized solubility rules, a solubility chart, and practical testing. Most phosphates are insoluble, with magnesium phosphate being no exception. A solubility chart shows the interaction between magnesium ions and phosphate ions, confirming insolubility. Although a small amount may dissolve, it is negligible. The video suggests testing by adding magnesium phosphate to water to observe the result, reinforcing the conclusion.

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7 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the solubility status of magnesium phosphate in water?

Insoluble

Highly soluble

Partially soluble

Soluble

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to solubility rules, which of the following is true about phosphates?

Most phosphates are insoluble with exceptions

Phosphates are always soluble with magnesium

Phosphates are never soluble

All phosphates are soluble

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the solubility chart indicate about magnesium phosphate?

It is highly soluble

It is insoluble

It is partially soluble

It is soluble in hot water

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where are the positive ions located on a solubility chart?

In the center

On the left

On the right

On the bottom

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the charge of the magnesium ion in the solubility chart?

Mg4+

Mg3+

Mg2+

Mg+

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What practical method can be used to test the solubility of magnesium phosphate?

Putting it in water

Mixing it with oil

Heating it

Freezing it

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the expected outcome when magnesium phosphate is placed in water?

It will change color

It will react violently

It will remain mostly undissolved

It will dissolve completely

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