Separate Chemistry 1 Flashcards

1
Q

What can a titration be used to find?

A

Concentrations

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

Should you add the acid or alkali into the burette?

A

Acid

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

Why do you do a rough titration first?

A

So you know the rough location of the titre.

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

It takes 50cm3 of 0.25mol sulfuric acid to nutrilise75cm3 of Sodium hydroxide. Find the concentration of Sodium Hydroxide: 2NaOH+H2SO4-> Na2SO4+2H2O

A

0.333333333mol/dm3

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

What does % yield compare?

A

Actual and Theoretical Yield

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

What is the Theoretical Yield?

A

The mass of Product you make if all the reactants were converted into products.

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

2Fe2O3 + 3C -> 4Fe + 3CO2. Calculate % Yield if you start with 45Kg of Iron Oxide and produced 20Kg of Iron.

A

63.4920635%

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

What does 100% yield mean?

A

You got all the products you expected to get

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

Give 3 reasons why you don’t get 100% yield?

A

Incomplete Reactions
Practical Losses
Unwanted reactions occurring

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

What is Atom Economy?

A

The % of reactants changed into useful products

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

What is the formula for Atom Economy?

A

Atom Economy=(total Mr of desired products/total Mr of all products.)*100

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

What does 100% atom economy mean?

A

All the atoms in the reactants have been turned into useful products

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

What 2 things is high atom economy good for?

A

Profits and the Environment

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

Do higher pressures favour the forward or backward reaction in the Haber Process?

A

Forward

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

Do higher temperatures favour the forward or backward reaction in the Haber Process?

A

Backward

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

What are the compromise conditions reached in the Haber Process?

A

200 atm of pressure and 450C

17
Q

What is the catalyst used in the Haber Process?

A

Iron

18
Q

What do fertilisers do?

A

Help plants grow

19
Q

Which are the 3 main elements needed for plants to grow?

A

Nitrogen, Potassium and Phosphorus

20
Q

What Is used to produce nitrogen-containing compounds?

A

Ammonia

21
Q

Give the balanced equation to create ammonium salts.

A

NH3+HNO3–> NH4NO3

22
Q

Give one way you can make ammonia sulfate in the lab.

A

Using titrations with ammonia and sulfuric acid

23
Q

What is the equation to calculate the volume of gas from the number of moles?

A

Molar Volume=Volume/Moles

24
Q

What volume does one mole of gas always occupy at RTP?

A

24dm3

25
Q

How many moles are there in 8280cm3 of chlorine gas at RTP?

A

0.345moles

26
Q

What is the only product of the reaction in a hydrogen-oxygen fuel cell?

A

Water

27
Q

What is the overall balanced equation for the reaction in a hydrogen-oxygen fuel cell?

A

2H2 + O2 –> 2H2O

28
Q

Give 2 reasons why hydrogen fuel cells will not be widely used for a while.

A

Very explosive and hard to store the hydrogen
Hydrogen takes up a lot of space in storage
Hydrogen comes from hydrocarbons that comes from crude oil