Title Page (10 points) – on a page by itself

Title :Chemistry of life/microscope use/cell structure & function

Your Name Lab partner names Instructors name Period Date

Purpose / hypothesis (10 points)

CHEMISTRY To be able to review the organization of atoms and

molecules, types of chemical interactions, and basic categories of organic compounds and to differentiate between types of organic compounds.

CELL STRUCTURE To review the structure and functions of major cellular

components and to observe examples of human cells.

MICROSCOPE USE To be able to identify the parts of a microscope, focus a

microscope and give record magnification

HYPOTHESIZE

pH station – If I test the pH ofVinegar, apple cider, baking soda, water, lemon juice, soda

Then I infer that ________ will be most acidic and _______ will be the most alkaline (basic).

Mono-saccharides (simple sugars) – If I test the presence of mono-saccharides inWater, glucose, soda, egg albumin, starch

Then I infer that _________ will show the presence of mono-saccharides

Which solution will show the presence of polysaccharides (starch)Water, glucose, soda, egg albumin, starch

SAME AS ABOVE

Materials (10 Points)

Test tubes Beakers Tongs Hot plate Pipettes SOLUTIONS: glucose, starch, water, lemon, soda, egg albumin,

vinegar, apple cider, baking soda water SOLUTION INDICATORS: benedict, iodine, pH indicator papers Microscopes Slides Coverslips toothpicks Methylane blue

Methods/procedure (10 points) In a normal experiment you would describe in detail every step of the experiment so anyone

looking at your notes would be able to repeat it.

For this lab you will Briefly explain what was done at each station! This should end up being about 1-2 good paragraphs.

Example – At the chemistry lab stations we tested for the presence of proteins, mono-saccharides and starches using the following substances and an indicator solution. (egg white, water, soda, starch, and glucose). We also tested the pH of water, lemon, vinegar, apple cider, baking soda and soda.

There was a station were we labeled the microscope and viewed tissue slides at 3 magnifications. We also stained cheek cells, sketched results and compared other tissue slides.

Data (10 points)put this data only in your lab book and put a + in the column where the organic molecule was present. If you have any different results it would be due to cross-contamination with the pipettes or graduated cylinders.

SUBSTANCE protein monosaccharides starch

starch +Glucose solution +

water

Egg albumin +soda +

Discussion/analysis (20 points)

Question? Write the question or restate the question in your answer.

1. What substance did you find to be the lowest pH. What does this mean in terms of H+?

2. What is the hardest part about viewing a slide through the microscope?

3. Why did the egg albumin become solid?

4. Why would mono-saccharides not be indicated in the starch solution?

Conclusion (10 points)

Accept or reject hypothesis. Make sure to restate it!

Graphs (10 Points)

Ph scale graph Your graphing your results on a pH

scale. Refer to your text to create the graph

Check your answers for worksheet questions

Chemistry of life

1. B

2. E

3. H

4. J

5. F

6. I

7. C

8. D

9. K

10. G

11. A

12. L

Molecules and bonding

1. 1, 1

2. 17, 7

3. Drawing

4. No

5. No

6. Covalent see next slide

Answer to number 5 & 6 on molecules and bonding Covalent bond The sharing of the electrons in the H-Cl

bond is not even. This is due to the high electronegativity of Chlorine, which results in the Chlorine nucleus pulling the electrons in that pair closer to it than does the Hydrogen atom. In fact, the electrons from that bond spend virtually no time around the Hydrogen nucleus.

This means that the Hydrogen nucleus, which is just a single proton, is very loosely held to the Chlorine atom. As soon as the HCl molecule encounters any other atom or ion that has even a slight tendency to pull positively charged particles (such as protons) towards it, the proton will detach and so the HCl molecule will break up into a free proton (+ charge) and a negatively charged Chloride ion:

Part B pH scale

3. No

4. Chlorine is added to tap water to kill bacteria and it is a basic solution. So tap water may be more like 7 or 7.5

5. pH scale should go in the graph portion of your lab report

Critical thinking

A person on a high protein, low carb diet should consume egg white and drink lots of water.

Cell structure & funcitonPart A

1. A

2. G

3. K

4. L

5. I

6. F

7. C

8. B

9. D

10. E

11. H

12. J

Part B

1. Lipids, proteins & carbs.

2. Double lipid bi-layer

3. Water soluble

4. Protein

5. ??? Proteins

Part C

2. Easier to see nucleus and border

3. Same size and shape

Part D

4. Membrane & nucleus

5. Shape, stucture