AQA GCSE Combined Science Paper 1 Higher Tier (8464/C/1H) - 22nd May 2023 [Exam Chat]

The question states:

describe how solid magnesium chloride is obtained from the reactions mixture. Upon reading it again, it states the magnesium is in excess. Meaning the final reaction mixture will have magnesium solid and magnesium chloride dissolved in water as a liquid.

to obtain magnesium chloride as a solid you would then have to do 2 steps, the first being to filter like you said to remove the excess magnesium solid (which is 1 mark), the second step will be to take the magnesium chloride aqueous solution and crystallise the solid by evaporating off the water. Giving you a solid

I believe that due to the solid magnesium being excess, the reaction of evaporating? Has already occurred and the gas has condensed, so the magnesium chloride can be filtered

Reply 161

arrow1801

7

Original post by meganm_b07

I believe that due to the solid magnesium being excess, the reaction of evaporating? Has already occurred and the gas has condensed, so the magnesium chloride can be filtered

I got crystallisation it was 1 marks ?

Reply 162

username6112117

8

How did everyone find the physics paper? What did everyone get for the voltmeter question where you he to put a voltmeter on the graph and for the question where I was like this person got 26 for the answer why are they incorrect something like that it was 2 marks?

Reply 163

rse234

8

Original post by suzy23

How did everyone find the physics paper? What did everyone get for the voltmeter question where you he to put a voltmeter on the graph and for the question where I was like this person got 26 for the answer why are they incorrect something like that it was 2 marks?

the voltmeter you had to draw an extra parallel branch underneath with voltmeter on and idk what question the 26 one was

Reply 164

username6112117

8

What did everyone get for like the water percentage question where they had to determine if the person water percentage was health by using the graph?

Reply 165

rse234

8

Original post by suzy23

How did everyone find the physics paper? What did everyone get for the voltmeter question where you he to put a voltmeter on the graph and for the question where I was like this person got 26 for the answer why are they incorrect something like that it was 2 marks?

oh the 26 one was the resistance one i said it’s a parallel circuit so the total resistance is less than the smallest individual resistor so the total resistance must be less than 20 ohms (one of the resistors was labelled 20 ohms)

Reply 166

username6112117

8

Original post by rse234

oh the 26 one was the resistance one i said it’s a parallel circuit so the total resistance is less than the smallest individual resistor so the total resistance must be less than 20 ohms (one of the resistors was labelled 20 ohms)