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Science Chem 2 > ALL OF IT > Flashcards

ALL OF IT Flashcards

1
Q

Main Ingredient in fizzy drinks

A

Carbon dioxide

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2
Q

Taste of acids

A

sour

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3
Q

Names of some acids

A 
Hydrochloric acid
Nitric Acid
Acetic acid
Citric acid
Sulphuric acid
Carbonic acid
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4
Q

Why are some acids are more dangerous?

A

Because some of them are stronger than others, and they corrode things.

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5
Q

What is an indicator?

A

An indicator tests for acids and alkali

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6
Q

Examples of common laboratory acids

A

Hydrochloric acid
Sulphuric acid
Nitric acid

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7
Q

Common laboratory alkalis

A

Sodium Hydroxide
Ammonia
Calcium Hydroxide (marble chips)

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8
Q

What is a neutral substance?

A

Litmus paper is not affected by neutral substances. It stays green. It is usually harmless.
Examples: Water, sugar solution, sodium chloride solution (salt)

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9
Q

What colour does blue litmus go in acids?

A

Red

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10
Q

What colour does litmus turn in neutral substances?

A

Stays green (pH 7)

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11
Q

What colour does red litmus go in alkalis?

A

Blue

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12
Q

What does a pH scale measure?

A

The strength of acids and alkalis

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13
Q

What are the pH numbers of strong and weak acids and alkalis??

A

pH 1 to pH 3 is a strong acid. pH 4 to pH 6 is a weak acid. pH 8-11 is a weak alkali, and pH 12-14 are strong alkalis.

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14
Q

What is meant by neutralization?

A

Adding either acids into alkalis or alkalis into acids to make them go to pH 7.

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15
Q

What is meant by neutralization?

A

Adding either acids into alkalis or alkalis into acids to make them go to pH 7.

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16
Q

What are independent, dependent and control variables?

A

Independent: The variables that can be changed by the researcher (Cause)
Dependent: Is the response/result (Effect)
Control: Constant and unchanged

17
Q

What to look for to see if there has been a chemical reaction.

A

Fizzing (gas), change in color, change in temperature etc

18
Q

Examples of chemical reactions.

A

Photosynthesis - Carbon dioxide into glucose and oxygen.

19
Q

Common laboratory alkalis

A

Sodium Hydroxide
Ammonia
Calcium Hydroxide (lime water)

20
Q

Examples of chemical reactions.

A 
Photosynthesis - Carbon dioxide into glucose and oxygen.
Combustion - Burning - Fuel, heat, and carbon dioxide = energy
Oxidation - Heat + Energy + copper + oxygen = copper oxide (black)
                  magnesium oxide (white and remember that flash?)
                  iron oxide (rust)
Acid-base reaction - Acid + base (marble chip a.k.a sodium hydroxide) = sodium chloride/potassium chloride
21
Q

Difference between chemical reaction and physical changes

A

A chemical reaction is generally irreversible or hard to reverse. A physical change is a change between states; solid, liquid and gas.

22
Q

Word equation of the reaction between an acid and a metal

A

acid+metal=salt+hydrogen

23
Q

What happens when acid and metals react?

A

Hydrogen and salt

24
Q

How to test for carbon dioxide

A

Lime water should turn milky

25
Q

Examples of carbonates

A

Calcium carbonate
Sodium carbonate
Hydrogen carbonate

26
Q

What happens when rocks react with acids

A

corrodes

27
Q

Key facts about acid rain

A

Sulphuric acid + calcium hydroxide = calcium sulphate + water

28
Q

Which gas in the air is needed for fuels to burn?

A

Oxygen

29
Q 
The metal grill of the barbecue is made of steel
Which properties are needed for the metal grill?
Choose two
-It conducts electricity
-It has a very high melting point
-It is shiny
-It is rigid
-It is magnetic
-It rusts.
A

It is rigid

It has a very high melting point

30
Q

Names of fossil fuels

A

Oil
Coal
Natural gas

31
Q

Who left One Direction?

A

Zain Malik

32
Q

Antarctica or the Arctic?

A

Depends. You want penguins or polar bears??

33
Q

Sulphur + oxygen

A

Sulphur oxide

Science Chem 2 (1 decks)

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