"Solubility of different substances in water" Dissolution PPT courseware 3

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"Solubility of different substances in water" Dissolution PPT courseware 3

Some solids, liquids and gases can dissolve in water. Are there any differences in the solubility of different substances in water? Let's compare by doing a comparative experiment.

Solubility of salt and baking soda in water

Guess: Which one has the strongest dissolving ability in water, salt or baking soda?

Discussion: How can this experiment be fair?

1. Weigh the plastic cup first. Cup weight + salt weight = total weight

3.5g +20g=23.5g

Move the 20g weight + free weight to the 3.5 scale position and weigh it once.

2. Weigh the paper first, paper weight + salt weight = total weight

1g +2.5g=3.5g

The 3.5 scale position of the travel code is weighed 8 times.

Experimental conditions

salt baking soda

(1). Table salt - 20 grams. Baking soda - 20 grams.

(2), water - 50 ml water - 50 ml

(3) Number of servings - 8 servings (2.5g each) Number of servings - 8 servings

(4) Amount added each time - 2.5g Amount added each time - 2.5g

(5) Stir - Stir with baking soda at the same time Stir - Stir with salt at the same time

(6) Adding method - add the second part after the first part is completely dissolved

(7), Dissolved amount - ( ) parts ( ) grams Dissolved amount ( ) grams

Water can also dissolve small amounts of gases.

In order to observe the solubility of gas in water, we can do an experiment. Ask students to read the second part of the text and observe the diagram.

Expanded information:

How to compare the solubility of salt and baking soda in water?

To compare the dissolving power of salt and baking soda, the variables that need to be controlled are:

dissolution phenomenon in life

Phenomenon Reason

Use an oxygen pump to pump oxygen into the fish tank. More oxygen will be dissolved in the water.

Detergent can wash away oil stains. That's because the oil stains are dissolved in the detergent.

When making tea, the boiled water turns green. That’s because the substances in the tea leaves have dissolved in the water.

When iodine particles are put into colorless and transparent alcohol, it turns into yellow iodine. The iodine dissolves in the alcohol.

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"Solubility of different substances in water" Dissolution PPT download:

"Solubility of Different Substances in Water" Dissolution PPT Download Part One Content: Solubility of Salt and Baking Soda in Water 1. Comparatively observe the solubility of salt and baking soda in water. Experimental purpose: By putting salt and baking soda into water respectively Dissolved in water, than...

"Solubility of different substances in water" Dissolution PPT:

"The Solubility of Different Substances in Water" Dissolution PPT Part 1: The solubility of salt and baking soda in water. Do you know them? Baking soda is a white solid powder and is widely used in industrial and agricultural production. It is also the most widely used in the food industry..

"Solubility of different substances in water" Dissolution PPT courseware 4:

"Solubility of Different Substances in Water" Dissolution PPT Courseware 4 The solubility of salt and baking soda in water. Guess: Which one has the stronger solubility in water, salt or baking soda? Discussion: How can this experiment be fair? Research Experiment Research Question: Food...

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Update Time: 2024-09-30

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