?? conc in 0.1 or 0.2 NaOHi have a question though after we get the concentration won't we have to divide it by 2 ?
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Chemistry: Post your doubts here!
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Btw I read the report: read it again, examiner says either can be on either axis. He's not complaining just stati g that it doesn't matter there!
why u think that ??i have a question though after we get the concentration won't we have to divide it by 2 ?
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OHMYGOSH GUYS READ THE QUESTION! And NO, in ER it says B*0.1/20
-BECAUSE Succinic Acid is a DICARBOXYLIC ACID one mole reacts with 2 MOLES of NaOH so we divide my 2 according to the Equation.
thanks for the fact, only more able candidate can observe it
nd u did toowhats the second column heading ??
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thanks for the fact, only more able candidate can observe it
No problem! And not at all, just read the question verrrrrry carefully!
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I think C*0.02/50 !!
ok thanks !!
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She's Pakistanithanks for the fact, only more able candidate can observe it
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http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w09_qp_51.pdf
AoA,in q2 cant i subtract excess zinc and mass of tube from the mass of tube to obtain the excess zinc i.e D-A?
AoA,in q2 cant i subtract excess zinc and mass of tube from the mass of tube to obtain the excess zinc i.e D-A?
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The question says that NaOH should be in excess so the acid must be less than 0.06 mol.
Make any arrangment but the volume of all acids must stay constant eg 25 cm3 and 2 moldm.
Dibasic acids such as H2So4 dissociate two H ions so their cocentration should be further half than monobasic acids..
ahope u get that
Make any arrangment but the volume of all acids must stay constant eg 25 cm3 and 2 moldm.
Dibasic acids such as H2So4 dissociate two H ions so their cocentration should be further half than monobasic acids..
ahope u get that
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Jazak Allah
i get it
but what i want to ask is soo for the dibasic acid i will use concentration as 1 moldm^-3 ?
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Insha Allah andnthat too with great marksDon't worry, it'll happen. Keep faith in Allah and pray a lot, there're still 10 days 15 days to p4, revise only the group chemistry and the organic of AS, not the whole syll really. InshAllah, we'll pass
Ameen ! So which group do i need to stress upon ? And could you help me with paper 5 chemistry and physics best tips ? Like best ones?- Messages
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Jazak Allah
i get it
but what i want to ask is soo for the dibasic acid i will use concentration as 1 moldm^-3 ?
actlyyes exactly!
Paper 5 May June 10 52
Can someone please tell me how to make the molal solutions. Question 1 part d)
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s10_qp_52.pdf
Can someone please tell me how to make the molal solutions. Question 1 part d)
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s10_qp_52.pdf
(mol of a solid)x1000/mass of water
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ummmm no you can't :/
because you have to find the mass of zinc used up
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Can u explain..i thought that excees of zinc will react so found tht one