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i don't know whose ryt over here but i don't understand why r u dividing 5/2 to get 2.5 there is one student in our school who did like u did!!i got 2.5 x 10^-3mol/dm^3.......
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i don't know whose ryt over here but i don't understand why r u dividing 5/2 to get 2.5 there is one student in our school who did like u did!!i got 2.5 x 10^-3mol/dm^3.......
because ratio of 2I- : I2 is 2:1 and we were using iodide, not iodine for the experiment......so u have to divide by 2 because the question was asking about iodine i think......:/i don't know whose ryt over here but i don't understand why r u dividing 5/2 to get 2.5 there is one student in our school who did like u did!!
no problem u will loose 1-2 marks for that but u will get the marks for the graph and for the table including units!!!!!
um...for moles of thiosulphate i got 5 x 10^-5 and for moles of iodine i got 2.5 x 10^ -5and then concentration finally i got 2.5 x 10^-3.....wbu? what did u get for the moles part?i did that but i got 5*10^-4
Actually i don't remember that!! sorryum...for moles of thiosulphate i got 5 x 10^-5 and for moles of iodine i got 2.5 x 10^ -5and then concentration finally i got 2.5 x 10^-3.....wbu? what did u get for the moles part?
owh okay no pActually i don't remember that!! sorry
Yes i got that exact valuelast calculation part on page 3 before the table i got 5*10^-4 mol/dm^3 as my conc for I2 what was urs??
owh man! i hope i didn't err somewhere then;((((Yes i got that exact value
last calculation part on page 3 before the table i got 5*10^-4 mol/dm^3 as my conc for I2 what was urs??
which one u r talking about?i got d same ! wat u got for d othr 2 mole c ques?
Actually i don't remember that!! sorry
i got 5*10^-4hey for final conc i got 4.9x10^-5 or -4 ..cant rem
i don't know about that total volume for that conc was 50cm^3 for which u had to find the conc!!didn't the question say to divide by the total volume which was 20 cm3????? Then it would be 2.5*10-5* 1000/20 to give you 1.25*-3.... the question actually said divde by the total volume.. Didn't it?
maybe!!btw u shouldn't get any wrong observation unless u have used wrong reagents to identify!!Guys ..... wat if some1 makes a wrong observation and deduces their salt according to their own observation .... do they get the error carried forward mark ???
My reagents were correct .... jst that I had gone colour blind or something then .... .... Mixed up yellow nd cream ppt ... Sighmaybe!!btw u shouldn't get any wrong observation unless u have used wrong reagents to identify!!
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