Qualification > Reference Material

Chemistry P6 18/5/010

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ismailb_1993:

--- Quote from: A@di on May 17, 2010, 12:57:20 pm ---It is lower because the y-axis reads Mass. More concentration, more particles of marble chips will react and thus the mass will decrease. Thus, the curve will be lower.

--- End quote ---

that's exactly what i thought as well, but when i checked the mark scheme which in fact is unofficial  it indicated that it would level off at the same level...i guess it's wrong.

Mr.Lonely:
hey guys i hve a ques????
wat volume of HCL  is need 2 neutralise 25 cm cubed of NaOH
ppr 6 2009 ques 2d(iii)??
rsvp

WARRIOR:

--- Quote from: Mr.Lonely on May 17, 2010, 01:27:19 pm ---hey guys i hve a ques????
wat volume of HCL  is need 2 neutralise 25 cm cubed of NaOH
ppr 6 2009 ques 2d(iii)??
rsvp

--- End quote ---

oct/noc or may june?

Mr.Lonely:
ooh ya sry .. may/june :)

Ghost Of Highbury:
Yes it will level off the same level because the mass and size of the marble chips didnt change. Wat changed was the concentration of HCl which made the reaction faster. At last, all the marble chips were used and thus the mass remained the same.

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