Upload
lynch
View
55
Download
0
Tags:
Embed Size (px)
DESCRIPTION
SOLUBILITY INVESTIGATION. If we stir salt crystals in water they seem to disappear. Where do the crystals go?. Some important terms. soluble. A substance that dissolves: A substance that doesn’t dissolve: How well something dissolves: The solid that you are dissolving: - PowerPoint PPT Presentation
Citation preview
SOLUBILITYINVESTIGATIO
N
If we stir salt crystals in water they seem to disappear.Where do the crystals go?
Some important terms• A substance that dissolves: • A substance that doesn’t dissolve: • How well something dissolves: • The solid that you are dissolving: • The liquid that you are dissolving it in: • The product after dissolving: • When no more solid will dissolve:
soluble insoluble
solubility solute
solvent solution
saturated
solution solvent
solute
OK, who remembered what?
Scientific MethodSTEP 1: State the Question
Do most boys like ice cream?
Do 5G prefer the scenery on Mars or Jupiter?
How many boys in 5G prefer white chocolate to milk chocolate?
detailed doable
detail? do
able?duh?detai
l? do
able?
Oh Yeah!
Scientific MethodSTEP 2: Formulate a Hypothesis (predicted result)
Most boys prefer milk chocolate.
I think 10 boys will prefer white chocolate.
40% of boys in 5G will prefer milk chocolate.
detailed statement
How many?
Not a statement!
detail?
statement?
Scientific MethodSTEP 3: Identify Variables (things that vary)
What we are changing (Independent Variable): Type of chocolate
What we are measuring (Dependent Variable):
Number of boysWhat must stay the same for a fair test (Fixed variables):
Same time
Same amount of chocolate
Same temperature chocolate
Scientific MethodVariables for YOUR Investigation:
• Type of solute• Type of solvent• Temperature of solvent• Speed of stirring• Size of solute particles• Apparatus used• Time taken
Scientific MethodSTEP 4: Method – detailed set of steps1. Keep chocolate at room temperature for 1 hour.
2. Break slab of chocolate into pieces of 1 block each.
3. Give boys 1 piece of each type of chocolate to eat.
4. Count total number of boys.
5. Ask boys to raise hands if they prefer white chocolate.
6. Calculate percentage that prefer white chocolate.
Scientific MethodSTEP 5: Results
1. Accurate.
2. Show all the details.
3. Remember to write down the units (grams, seconds, °C)STEP 6: Analysis and Discussion
4. Bar Graph.
5. Is your hypothesis proved correct?
6. Do your results agree with background information?