- Messages
- 23
- Reaction score
- 7
- Points
- 3
Yeah no colour change for KI. What grade are you expecting
We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
ask me which ones.. i know correct answers for all
Probably 1 mark onlyoh my god i just realised i forgot to convert joules to KJ... i got the right value but i forgot to convert!! how many marks am i losing here??
What are the correct answers?ask me which ones.. i know correct answers for all
My titre volume was 26.3 cm^3.It wwas gud... Alhamdulillah...
wat was the titre volume?
pls inbox me if u are not allowed to reply here...
only thing i think is wrong here is the % error which i also got wrong.Q.1) Titration
Q.2) Enthalpy change
- At my centre, supervisor's titre value = 26.00 cm3
- My mean titre value (Volume of FB2 used) = 26.25 cm3
Q.3) Salt Analysis
- Temperature fall in 1st experiment = 8.0 °C
- Temperature fall in 2nd experiment = 13.0 °C
- Mean temperature fall = 10.5 °C
- Enthalpy change of solution = +14.7 kJ/mol
- 1st Experiment had greater % error because smaller mass was used.
- % error = 6.25%
- Cation in FB4 = Manganese (II)
- Anion in FB4 = Chloride
- Suggested cations in FB5 = Magnesium or Aluminium
- Suggested anions in FB5 = Sulfate or Sulfite
- Cation in FB5 = Magnesium (II)
- Cations in FB6 = Ammonium and Iron (III)
did you copied mine ? lol i got the same results as you except for the titre i was getting 26.5 whereas my supervisor was getting 25.8 :/ how much marks will i be losing in this ?Q.1) Titration
Q.2) Enthalpy change
- At my centre, supervisor's titre value = 26.00 cm3
- My mean titre value (Volume of FB2 used) = 26.25 cm3
Q.3) Salt Analysis
- Temperature fall in 1st experiment = 8.0 °C
- Temperature fall in 2nd experiment = 13.0 °C
- Mean temperature fall = 10.5 °C
- Enthalpy change of solution = +14.7 kJ/mol
- 1st Experiment had greater % error because smaller mass was used.
- % error = 6.25%
- Cation in FB4 = Manganese (II)
- Anion in FB4 = Chloride
- Suggested cations in FB5 = Magnesium or Aluminium
- Suggested anions in FB5 = Sulfate or Sulfite
- Cation in FB5 = Magnesium (II)
- Cations in FB6 = Ammonium and Iron (III)
Nig i was getting the sameonly thing i think is wrong here is the % error which i also got wrong.
3 marks as my supervisor told me. Nothing else.did you copied mine ? lol i got the same results as you except for the titre i was getting 26.5 whereas my supervisor was getting 25.8 :/ how much marks will i be losing in this ?
another thing;i used my titration results for my moles calculation (obviously) if my titre volume was incorrect will i be getting ecf? -_- how much i'll be losing in Question 1?
how did you calculate?Nig i was getting the same
.5/8 *1003 marks as my supervisor told me. Nothing else.
how did you calculate?
It would have be 1/8*100.As we take 2 readings and in every there is chance of 0.5 error so max in 2 is 1.5/8 *100
coolIt would have be 1/8*100.As we take 2 readings and in every there is chance of 0.5 error so max in 2 is 1
Wat were the ions in the last question??ask me which ones.. i know correct answers for all
lol not copied, it's just the same. Probably 3 to 4 marks, examiner will consider ecf so don't worry for moles calculationdid you copied mine ? lol i got the same results as you except for the titre i was getting 26.5 whereas my supervisor was getting 25.8 :/ how much marks will i be losing in this ?
another thing;i used my titration results for my moles calculation (obviously) if my titre volume was incorrect will i be getting ecf? -_- how much i'll be losing in Question 1?
For almost 10 years, the site XtremePapers has been trying very hard to serve its users.
However, we are now struggling to cover its operational costs due to unforeseen circumstances. If we helped you in any way, kindly contribute and be the part of this effort. No act of kindness, no matter how small, is ever wasted.
Click here to Donate Now