GCSE OCR 21st Century Triple Science (CBP1-7) Thread Watch

sammmyyy
Badges: 0
Rep:
?
#1181
Report 4 years ago
#1181
(Original post by Swag>education)
Was is h2SO4 or H+H+SO4
And I thought reduction was adding electrons (thats what it said about electrolysis) not removing oxygen
When you are referring to electrolysis yes, but in the case of mining you are reducing the copper oxide (removing oxygen) and oxidising carbon to form carbon dioxide
0
reply
iodqwm
Badges: 0
Rep:
?
#1182
Report 4 years ago
#1182
(Original post by brodingoson)
I put the exact same as you, I think it's right, so 6 marks...haha


Posted from TSR Mobile
Don't get so happy because there's a totally different answer which makes just as much sense:

A similar as both HCL and H2SO4 are acids so their PH's are lower than 7.
B similar as they both react to produce hydrogen.

C different because it produces a white precipitate for the reaction with HCL whereas the H2SO4 would not react with silver.
D different because it produces a white precipitate when the H2SO4 reacts with barium whereas barium and HCL would not form precipitates.
0
reply
iodqwm
Badges: 0
Rep:
?
#1183
Report 4 years ago
#1183
(Original post by Swag>education)
I didnt understand because it only showed hcl with nitrate solution not with the barium and sulphuric acid was only shown reacting with the barium not the silver nitrate
That was a difference. Barium reacting with sulfuric acid but not HCL.
0
reply
Sulfur
Badges: 0
Rep:
?
#1184
Report Thread starter 4 years ago
#1184
(Original post by iodqwm)
Does no one know??
The page with A,B,C,D tests came to 6 marks
Then there was a page after it worth 2 marks (naming salts)
0
reply
iodqwm
Badges: 0
Rep:
?
#1185
Report 4 years ago
#1185
Please guys, does anyone know how many marks the last question was worth because i think i misread it. I thought it was with magnesium.

Oh thanks sulfur>

2 marks is not much to lose.
0
reply
HappyHylian
Badges: 0
Rep:
?
#1186
Report 4 years ago
#1186
(Original post by iodqwm)
Don't get so happy because there's a totally different answer which makes just as much sense:

A similar as both HCL and H2SO4 are acids so their PH's are lower than 7.
B similar as they both react to produce hydrogen.

C different because it produces a white precipitate for the reaction with HCL whereas the H2SO4 would not react with silver.
D different because it produces a white precipitate when the H2SO4 reacts with barium whereas barium and HCL would not form precipitates.
That is exactly what I did =)
Oh wait.. no.. for B I said that "nothing happens at all". I thought that magnesium only reacted like that when it was put in COLD water. >>><<<<
0
reply
cupcakes16
Badges: 0
Rep:
?
#1187
Report 4 years ago
#1187
(Original post by Swag>education)
Was is h2SO4 or H+H+SO4
And I thought reduction was adding electrons (thats what it said about electrolysis) not removing oxygen
I also put reduction was gaining electrons.
Is it wrong?
0
reply
romaiseb
Badges: 5
Rep:
?
#1188
Report 4 years ago
#1188
(Original post by Sulfur)
The page with A,B,C,D tests came to 6 marks
Then there was a page after it worth 2 marks (naming salts)
What was your answer for the naming salt question?
0
reply
Sulfur
Badges: 0
Rep:
?
#1189
Report Thread starter 4 years ago
#1189
(Original post by romaiseb)
What was your answer for the naming salt question?

Sodium chloride, NaCl
Sodium sulphate, Na2SO4
0
reply
iodqwm
Badges: 0
Rep:
?
#1190
Report 4 years ago
#1190
(Original post by Sulfur)
Sodium chloride, NaCl
Sodium sulphate, Na2SO4
where did it say sodium was involved
0
reply
Sulfur
Badges: 0
Rep:
?
#1191
Report Thread starter 4 years ago
#1191
(Original post by iodqwm)
where did it say sodium was involved
Hydrochloric acid and Sulphuric acid reacts with sodium hydroxide.
0
reply
lyricalvibe
Badges: 16
Rep:
?
#1192
Report 4 years ago
#1192
(Original post by Sulfur)
Sodium chloride, NaCl
Sodium sulphate, Na2SO4
:yep: what did you put for the copper catalyst question?
0
reply
Sulfur
Badges: 0
Rep:
?
#1193
Report Thread starter 4 years ago
#1193
(Original post by lyricalvibe)
:yep: what did you put for the copper catalyst question?
Catalysts don't change/aren't affected by the reaction
Catalysts speed up the rate of reaction
Catalysts can be reused
React copper with the halogens and see if the rate increases
0
reply
cupcakes16
Badges: 0
Rep:
?
#1194
Report 4 years ago
#1194
(Original post by Sulfur)
Catalysts don't change/aren't affected by the reaction
Catalysts speed up the rate of reaction
Catalysts can be reused
React copper with the halogens and see if the rate increases
I put try the reaction with and without a catalyst to measure the rate of reaction, using a mass balance. Catalysts speed up the rate of reaction.
Is this right?
0
reply
Sulfur
Badges: 0
Rep:
?
#1195
Report Thread starter 4 years ago
#1195
(Original post by cupcakes16)
I put try the reaction with and without a catalyst to measure the rate of reaction, using a mass balance. Catalysts speed up the rate of reaction.
Is this right?
Looks like it
0
reply
lyricalvibe
Badges: 16
Rep:
?
#1196
Report 4 years ago
#1196
(Original post by olmyster911)
I had no idea what to write for copper one so I blabbed on about jobs, the economy and pollution from excess mining xD

What did you get for that question?
BC AD I I think :/ I forgot the question :/ I seem to be the only one, but I'm thinking A couldn't have been a similarity as it was talking about oH and the word SEE was highlighted, I think B was hydrogen forming and that would be seen by bubbles I think as it was dilute solutions ( I really don't remember the question so this may be Be :s ) for c as a similar because they both made a white precipitate for the same reaction and D they one made a precipitate while the other didn't react, that was the hardest question on the paper because of the vagueness and how prone to error it is, I spent at least 5 mins on it and it's still the question I have doubts on in the paper :/

what did you put and why?
0
reply
ToLiveInADream
Badges: 17
Rep:
?
#1197
Report 4 years ago
#1197
Lol, I don't think as well as I thought looking at these answers. Gonna have to ace C7 now..

Posted from TSR Mobile
0
reply
lyricalvibe
Badges: 16
Rep:
?
#1198
Report 4 years ago
#1198
(Original post by Sulfur)
Catalysts don't change/aren't affected by the reaction
Catalysts speed up the rate of reaction
Catalysts can be reused
React copper with the halogens and see if the rate increases
I said your 2 and 4th point, I also said something about having 2 experiments, one with catalyst and one without to see an increase in rate of reaction
What state did you put the question with the chloride and sulphate salts?
0
reply
iodqwm
Badges: 0
Rep:
?
#1199
Report 4 years ago
#1199
(Original post by ToLiveInADream)
Lol, I don't think as well as I thought looking at these answers. Gonna have to ace C7 now..

Posted from TSR Mobile
same
it's that abcd question that really bugs me!
0
reply
Sulfur
Badges: 0
Rep:
?
#1200
Report Thread starter 4 years ago
#1200
(Original post by lyricalvibe)
I said your 2 and 4th point, I also said something about having 2 experiments, one with catalyst and one without to see an increase in rate of reaction
What state did you put the question with the chloride and sulphate salts?
The last question? I'm pretty sure it didn't ask for a state since it just wanted the name and formula for two marks...? :confused:
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • University of the Arts London
    MA Design: Ceramics, Furniture or Jewellery Open Day Postgraduate
    Fri, 25 Jan '19
  • Coventry University
    Undergraduate Open Day Undergraduate
    Sat, 26 Jan '19
  • Brunel University London
    Undergraduate Experience Days Undergraduate
    Sat, 26 Jan '19

Are you chained to your phone?

Yes (109)
19.82%
Yes, but I'm trying to cut back (223)
40.55%
Nope, not that interesting (218)
39.64%

Watched Threads

View All