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"Dissolution Fast and Slow" Dissolution PPT Courseware 3
Comparative Experiment
In the two sets of experiments, except for one condition that needs to be studied, the other conditions are the same.
Small conclusion 1:
Through experiments, it was found that sugar dissolves faster in hot water than in cold water.
Small conclusion 2
Through experiments, we found that stirring can speed up the dissolution of sugar in water.
Small conclusion 3:
Through experiments, it was found that crushing rock sugar can speed up its dissolution in water.
The relationship between particle size and dissolution speed
1. There are 4 packs of rock sugar in the plastic bag. Please read the words on each pack carefully and choose the appropriate two packs of sugar according to the design for experiment.
2. When stirring with a bamboo stick, do not touch the wall of the beaker and stir evenly.
4. The experiment ends when one of the packets of sugar is completely dissolved or the command is heard.
Summarize
Factors that affect how quickly an object dissolves include:
water temperature
Is the water stirred?
particle size of object
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"Dissolution Fast and Slow" Dissolution PPT Download:
"Fast and Slow Dissolution" Dissolution PPT download Part 1: Which one dissolves faster 1. To explore whether stirring can speed up the dissolution of salt. Experimental purpose: to test whether stirring can speed up dissolution. Experimental materials: 2 beakers, 20 grams of salt, 1 stirring rod. Experimental steps: ..
"Dissolution Fast and Slow" Dissolution PPT:
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"Fast and Slow Dissolution" Dissolution PPT Courseware 5:
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