Grade 8----Chapter 7 Acids, Bases And pH
50 points.
- 1.Step 1: After you have completed the test, you may try to do some extra credit (1/2 point for each correct problem) on Balancing Equations. Here is the website: http://chemistry.about.com/od/chemicalequations/l/blbalancequiz.htm?lastQuestion=3&answers=3&submit=Next+Question+%3E%3E&ccount=1You can also access the website labeled Ch 6 Balancing Equations on my Chemistry page of the Z- Web Network. Step 2: Work on your Final Exam Study Guide
- 2.In this test you will not be able to navigate back and forth between questions. All of your work will be saved as you move forward in the test. However, please take your time in reviewing your answer before selecting it. You can not go backwards on the test. I will be coming around for the Binder Check and to check your pH lab. Please do not talk during the test. Thank you and Good Luck! Z
- 3.Which one of the following is an acid?
- A.
Lemon Juice
- B.
Salt Solution
- C.
Bleach
- D.
Water
- 4.Acids and alkalis can cause some dyes to change color. These dyes are called...
- A.
Solutions
- B.
Mixtures
- C.
Indicators
- D.
Solvents
- 5.What color does Universal indicator (the cabbage solution) turn in strong acid?
- A.
Orange
- B.
Green
- C.
Blue
- D.
Red
- 6.Some acids should be treated very carefully. This is because....
- A.
They are red.
- B.
They are corrosive.
- C.
They taste sour.
- D.
None of these.
- 7.Which piece of safety equipment should always be worn when handling acids and alkalis?
- A.
Tongs
- B.
Tripod
- C.
Gauze
- D.
Safety Goggles
- 8.A bee sting is acidic. To neutralize the pain, which of these substances could you put onto it?
- A.
Vinegar
- B.
Baking Soda
- C.
Lemon Juice
- D.
Water
- 9.One substance that can be used to make an indicator is:
- A.
Vinegar
- B.
Orange Juice
- C.
Red Cabbage
- D.
Soap
- 10.Which of the following substances would corrode metal the most?
- A.
Sulfuric Acid
- B.
Salt Solution
- C.
Lemon Juice
- D.
Vinegar
- 11.Alkalis can be dangerous as acids. Which of the following substances is the strongest alkali?
- A.
Hydrochloric Acid
- B.
Soap
- C.
Sodium Hydroxide/Bleach
- D.
Toothpaste
- 12.The pH scale measures:
- A.
The strength of an acid.
- B.
The strength of hydrogen ions.
- C.
The concentration of hydrogen ions.
- D.
The concentration of an acid.
- 13.You can find the pH of a substance by using...
- A.
Plain paper
- B.
A thermometer
- C.
Litmus indicator
- D.
A conductivity tester
- 14.Which is a characteristic property of acids?
- A.
They turn blue litmus paper red.
- B.
They turn red litmus paper blue.
- C.
They taste bitter.
- D.
They do not react with metals.
- 15.Which is a likely use for a base?
- A.
As a vitamin in your food.
- B.
Making foods taste sour.
- C.
Etching metals for printing.
- D.
Making soaps and detergents.
- 16.In a water solution, how do acids differ from bases?
- A.
Acids form hydrogen ions (H+), while bases form hydroxide ions(OH-).
- B.
Acids turn litmus blue, while bases turn litmus red.
- C.
Acids form salts, but bases do not.
- D.
Hydrogen ions (H+) remain dissolved, but hydroxide ions (OH-) do not.
- 17.In water, bases form
- A.
Hydroxide ions
- B.
Hydrogen ions
- C.
Hydrogen gas
- D.
Oxide ions
- 18.Neutralization is a reaction between a(n)...
- A.
Acid and a base
- B.
Acid and a metal
- C.
Base and salt
- D.
Salt and water.
- 19.Acids are described as "corrosive" because they....
- A.
Turn litmus blue
- B.
Taste bitter
- C.
"eat away" at other materials
- D.
Feel slippery.
- 20.Which does NOT belong:
- A.
Coke
- B.
Lemon
- C.
Baking Soda
- D.
Vinegar
- 21.Which does NOT belong:
- A.
Apple Juice pH 5
- B.
Ammonia pH 8
- C.
Tums/Rolaids pH 9
- D.
Shampoo/conditioner pH 7.5
- 22.What is the pH of a neutral substance?
- A.
5
- B.
6
- C.
7
- D.
8
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