7F Acids and alkalis Flashcards

1
Q

Name 2 acids you might find in your kitchen

A

Lemon (juice)

Vinegar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Name an alkali that you might find in your kitchen.

A

Oven cleaner

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Do acids taste sweet, salty or sour?

A

Acids taste sour.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What does this hazard symbol mean?

A

Toxic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What does this hazard symbol mean?

A

Corrosive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does this hazard symbol mean?

A

Harmful

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What do you call a substance that changes colour to show whether something is an acid or an alkali?

A

A substance that changes colour to show whether something is an acid or an alkali is called an indicator.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

If universal indicator goes red in a substance, what sort of substance is it?

A

If universal indicator goes red in a substance, the substance is a strong acid.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

If universal indicator goes yellow in a substance, what sort of substance is it?

A

If universal indicator goes yellow in a substance, then it is a weak acid.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

If universal indicator goes green in a substance, what sort of substance is it?

A

If universal indicator goes green in a substance, then the substance is neutral.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

If universal indicator goes dark purple in a substance, what sort of substance is it?

A

If universal indicator goes dark purple in a substance, then it is a strong alkali.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the name of the scale that indicates how acidic or alkaline a substance is?

A

The name of the scale that indicates how acidic or alkaline a substance is, is the pH scale.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What pH is a neutral solution?

A

A neutral solution is pH 7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What pH is acid?

A

Acid is pH 1 to 6.

1 is a strong acid and 6 is a weak acid.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What pH is alkali?

A

Alkali is pH 8 to 14.

8 is a strong alkali and 14 is a weak alkali.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

State the word that describes the reaction between an acid and an alkali.

A

The word that describes the reaction between an acid and an alkali is neutralisation.

17
Q

What is the general word equation for neutralisation?

A

acid + alkali → salt + water

18
Q

Is sodium hydroxide an acid or an alkali?

A

sodium hydroxide is an alkali.

Whenever you something hydroxide, that’s an alkali!

19
Q

The word equation for a reaction is:

hydrochloric acid + sodium hydroxide → sodium chloride + water

State the names of the two reactants in the word equation.

A

The names of the two reactants in the word equation are:

hydrochloric acid + sodium hydroxide

The reactants are what react together in the reaction

20
Q

The word equation for a reaction is:

hydrochloric acid + sodium hydroxide → sodium chloride + water

State the names of the two products in the word equation.

A

The names of the two products in the word equation are:

sodium chloride + water

The products are what forms after the reaction

21
Q

nitric acid reacts with calcium hydroxide to make a salt and water.

Write a word equation for this reaction.

A

nitric acid + calcium hydroxide → calcium nitrate + water

22
Q

nitric acid reacts with calcium hydroxide to make a salt and water.

What is the name of the salt formed

A

The salt formed would be calcium nitrate

23
Q

A student wants to prepare a salt of magnesium chloride from a neutralisation reaction.

Which acid should they use?

A

To make a chloride, you would use hydrochloric acid.

24
Q

A student wants to prepare a salt of magnesium nitrate from a neutralisation reaction.

Which acid should they use?

A

To make a nitrate, you would use nitric acid.

25
Q

A student wants to prepare a salt of copper sulphate from a neutralisation reaction.

Which acid should they use?

A

To make a sulphate, you would use sulphuric (sulfuric) acid.

26
Q

What would the word equation be for the reaction between hydrochloric acid and copper oxide?

A

hydrochloric acid + copper oxide → copper chloride + water

27
Q

When adding copper oxide (a black powder) to hydrochloric acid, how would you be able to tell that the neutralisation reaction was complete?

A

When the neutralisation reaction is complete, no more copper oxide will dissolve in the acid and you will be left with some black powder