chemistry lab

1. Write of short description (one brief sentence) of what happens in this reaction at the molecular level.

Q Choose the correct answer

2. In general, which one of the following is not true of liquids

A. The molecules are close together

B. The molecules are very far apart

C. The molecules attract each other by weak forces

D. The molecules are in motion

3. In general, which one of the following is true of gases

A. The molecules are far apart

B. The molecules interact with each other

C. The molecules are moving relatively fast

D. Some of these

E. All of these

4. Water may be contaminated with ______________ if it has not been treated to make it “safe”

A. Bacteria

B. Organic compounds (such as pesticides, herbicides )

C. Inorganic compounds (such as Pb ions)

D. Some of these

E. All of these

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5. I want camping and forgot to bring enough water , what I do to make the water safe to drink from a lake or creek? Last two possible things I could do

6. Show how two or three water molecules interact to make hydrogen bonds with each other ?

7. If the solution had a pH of 8 , the hydroxide ion concentration is ________ M

Q Choose the correct answer

8. If blood plasma has a pH of 7.4, it would be

A. Acidic

B. Basic

C. Slightly acidic

D. Slightly basic

9. Fresh milk has a pH of 6.7. this milk is

A. Acidic

B. Basic

C. Slightly acidic

D. Slightly basic

10. Name a fairly common acid that you might consume. Is it a strong, moderate or weak acid?

Q Choose the correct answer

11. What kind / type of reaction is this ?

A. Neutralization

B. Oxidation-reduction

C. Combustion

Answer

12. I added some KHCO3 to some acid (HCI)

Write a chemical equation describing this reaction using the language of chemistry

What type of reaction is this?

What is the salt that is formed?