Download Experimental Design Scenerio Iesha knew that salt was put out on

Experimental Design Scenerio
Iesha knew that salt was put out on the streets when the weather was predicted to go below 0°C.
She wondered what the effect of different salts would be on the freezing temperature of water.
To test this she set up 4 different beakers. She added 10 ml of distilled water to each beaker.
She then added 10 g of NaCl, 10 g of CaCl2, and 10g of AlCl3 to the other 3 beakers
respectively. All beakers where put in a cold room set to –5°C. After 30 minutes she checked
to see how much of the material in the beakers was solid. She repeated her test 2 more times and
got an average for each condition.
Instructions. Fill in template based on design.
Experimental Design Template
Title: How salts affect the freezing temperature of water.
Hypothesis: Adding salt to water will lower the freezing temperature of the water.
Prediction: If I add salt to water then the freezing temperature of the water will decrease.
Groups
Trials
Water
NaCl(aq)
CaCl2(aq)
AlCl3(aq)
3
3
3
3
I.V.: type of salt
D.V.: amount of water frozen
Control group(s): Water
Experimental group(s) NaCl(aq), CaCl2(aq), AlCl3(aq)
Constants: amount of water, amount of salt, freezing time, temperature of cold room,
location in cold room
Instructions. Create a data table that could be used to collect results from experiment.
Data table
Solution tested (IV)
Amount water (DV)
frozen
Water
NaCl(aq)
CaCl2(aq)
AlCl3(aq)