Blog Archives

Friday: 2.28.14

2/28/2014

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Do Now: no 'do now' today.

pH Mini Lab:

Students testing the items they brought in from home and recorded the results on their data table.

Homework:
Finish any missing assignments

Announcements:
No announcements.

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thursday: 2.27.14

2/27/2014

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Do Now:
At your table groups, write a definition for what a supersaturated solution is.

PH Mini Lab
Posed Question: What are the PH levels of 5 items around the house.
(students will each bring in 1 or 2 item from their home to test the PH level)

Hypothesis: In testing 5 household items, ________, ________ and _______ will test to be acids while ______ and ___________ will test to be bases.

Design an Experiment:
Materials

List your 5 items here
Forceps
Dropper
Hydrion Paper
Beakers

Procedure

Holding the hydrion paper with the forceps dip an unused paper into one of the 5 items.
Compare the color of the hydrion paper to the pH scale to determine if it is an acid, base or neutral.
Repeat steps 1 and 2 with a new hydrion paper and another item.

Collect Data
(Items will be different depending on what students brought in to test.)

Homework:
Bring in your item to test for tomorrow's pH lab

Announcement:
Don't forget to bring in your item to test in the lab!

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Tuesday: 2.26.14

2/25/2014

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Do Now:

EQ: What are the properties and uses of acids and bases

Cornell Notes: "Describing Acids and Bases"

Properties of Acids
Acid:

Sour Taste

Citrus Fruits (sour) are acidic: ****Acids should not be identified by taste***
*Lemons Unsafe!!!
*Grapefruit
*Oranges
*Limes

Reactions with Metals

Corrosive: wears metals away. Destroys!
Acids react with certain metals
*Magnesium
*Zinc
*Iron

Reactions with Carbonates

Acids react with negative carbonate ions to produce carbon dioxide gas.
Limestone contains a carbonate ion - reacts with acids (bubbles/gas)

Reactions with Indicators

Homework:

Finish Cornell Notes on Chapter 7 Section 3.
Notes will be stamped tomorrow at the beginning of class.

Announcements:

There are 2 assignments in this NEW MARKING PERIOD! If you only turn in 1 out of 2 you automatically have an "F".

TURN IN YOUR HOMEWORK

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Monday: 2.24.14

2/24/2014

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Do Now:

Cornell Notes: finish "Solutions, Colloids and Suspensions"

Suspensions:

Contains particles larger than the particles in a colloid and a solution.
Particles can be seen easily and separated by settling or filtration.
Does not have the same properties throughout.

New Vocabulary:

Concentrated solution: Large amounts of a solute in a solution.
Dilute Solution: Low amounts of a solute in a solution. For example, adding water to orange juice produces a diluted orange juice solution.
Solubility: How much solute can dissolve in a solvent.
Unsaturated Solution: Solute can still be dissolved in the solvent. For example, water is a unsaturated solution because I can add sugar or salt to the water and it will still dissolve.
Saturated Solution: Solute cannot dissolve in the solvent. For example, 3 cups of sugar in 1 cup of water is a saturated solution. The sugar will not dissolve in such a small amount of water.
Supersaturated Solution: When heated a solution can dissolve more solute than at a cooler temperature. For example, when heated I can dissolve 3 cups of sugar into 1 cup of water.