Chemistry Combined Science paper 1 8464 unofficial mark scheme 17/05/18

Reply 20

Higher only please

Q2: it was less reactive than hydrogen

Reply 22

pottah

17

What did everyone get for the six marker about the four substances?

I got silicon dioxide for D, the one with pH 7
Magnesium oxide for C, the one with pH 9
Sodium oxide for A, the one with pH 14
and phosphorus oxide for B, the one with pH 3

But I don’t know if that’s right, and the reasons I gave were a bit dodgy

Reply 23

ariarasoul20

10

I also put that down :smile:

Reply 24

ariarasoul20

10

i did the same thing as you but my reasons were also very dodgy

Reply 25

Quincytellem

14

For the practical question
The student should’ve used the wrong acid and base

Reply 26

ariarasoul20

10

Q3: Didn't know the answer just put dowm something like 2.90 (a numher between the other two intervals)

Reply 27

ariarasoul20

10

Urghhh I didn't see it for the practical question!!! I'm so blind

Q3: was 3.15

Q3: 1.80

I got 1.86 for the mass of iron question
I doubt that it’s right

Reply 31

ariarasoul20

10

To find X? The mean of mass was 3.15. I'm talkinh about the 1 marker before. what did u put?

Reply 32

Quincytellem

14

The mean question was 3.15 idk which question that was

What was question 3?

Original post by jawid12

So who failed😂😂

Yes

Reply 35

Pear_Crush

9

What did everyone put for A B C and D for the 6 marker

Reply 36

gracielyons15

13

Original post by Evil Homer

What exam board were you with?

Aqa

Reply 37

pottah

17

Original post by ariarasoul20

i did the same thing as you but my reasons were also very dodgy

Oh cool! I’m glad my actual answers weren’t completely wrong at least, one of my friends said something about reactivity but I didn’t put that at all whoops

Reply 38

tatemyboo

7

Original post by pottah

What did everyone get for the six marker about the four substances?

I got silicon dioxide for D, the one with pH 7
Magnesium oxide for C, the one with pH 9
Sodium oxide for A, the one with pH 14
and phosphorus oxide for B, the one with pH 3

But I don’t know if that’s right, and the reasons I gave were a bit dodgy