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Chemistry c1 > Acids > Flashcards

Acids Flashcards

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1
Q

What does oxidising mean

A

Provides oxygen which allows other materials to burn easier

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2
Q

What does harmful mean

A

Like toxic but not as dangerous

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3
Q

What does highly flammable mean

A

Catches fire easily

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4
Q

What does toxic mean

A

Can cause death by swallowing breathing in or absorption through the skin

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5
Q

What does irritant mean

A

Not corrosive but can cause redness or blistering of the skin

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6
Q

What does corrosive mean

A

Attacks and destroys living tissues including the skin and eyes

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7
Q

What are examples of acids and their Phs

A

Stomach acid ph0
Lemon juice ph2
Acid rain ph4
Normal rain ph5

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8
Q

What are examples of alkalis and their phs

A 
Caustic soda ph14
Oven cleaner ph13
Ammonia ph12
Pancreatic juice ph9
Washing up liquid ph8
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9
Q

What happens in a neutralisation reaction

A

Acid + base -> salt + water

The products are neutral

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10
Q

What are the uses of neutralisation reactions

A

Salts are used in fertilisers

Salts are used in fire works as colour

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11
Q

Why do we have stomach acid

A

Aid digestion
Enzymes in the stomach work best at and acidic ph
It helps to kill bacteria

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12
Q

What do indigestion tablets do

A

They neutralise some excess stomach acid by using a base such as calcium carbonate

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13
Q

Hydrochloric acid + copper oxide ->

A

Copper chloride and water

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14
Q

Hydrochloric acid + sodium hydroxide ->

A

Sodium chloride + water

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15
Q

Hydrochloric acid + sodium carbonate->

A

Sodium chloride + water + carbon dioxide

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16
Q

What is electrolysis

A

The decomposition of a substance using electrical energy
A liquid is required to conduct the electricity
The electricity is applied to the electrolyte using electrodes

17
Q

What is the anode

A

The positively charged electrode

18
Q

What is an anion

A

A negatively charged ion

19
Q

What is the cathode

A

Negatively charged electrode

20
Q

What is the cation

A

The positively charged ion

21
Q

What is the test for chlorine gas

A

Chlorine bleached damp litmus paper turning it white

22
Q

What is the test for hydrogen

A

Hydrogen makes a squeaky pop when a lit split is put into test tube with hydrogen present

23
Q

Describe electrolysis of salt

A

Sea water or brine can be decomposed by electrolysis this makes chlorine gas

24
Q

What is chlorine gas used for

A

To treat water supplies by killing bacteria
For manufacture of bleach
To make poly(chloroethene)

25
Q

What is the test for oxygen

A

If a glowing splint is put into oxygen then it will relight

Chemistry c1 (5 decks)

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