00:01
So here first we will talk about sample contains k2 so4, k2 so4, right? and nh4 twice so4 right? so now first we will take reaction k2 so4 plus here we can write ba, no3 twice, then here write baso 4 plus 2 kno 3 okay and second here we can write nh 4 twice so 4 plus then react with ba no 3 twice then we will get baso 4 plus we will react so now we sorry we will get 2 nh 4 no 3 right so now move so here so 4 minus 2 plus b a 2 plus then we get baso 4 4 4 solid right so, moles of b .a.
01:41
So 4 produce, moles of b .a.
01:48
So4 produces equal to moles of so4 minus 2, right? is that clear? which are present in sample, k2 so4 and nh 4 twice so4.
02:16
So now here, we can calculate moves of p .pt bso4 equal to we can write 0 .9779 over 233 .39 gram per month.
02:56
So now we will get here answer 4.
02:58
4 .186 multiply with 10 to the power minus 3 moles.
03:08
Right? is that clear? so this is moles of ppt b.
03:16
So4.
03:16
So now we can say moles of so4 minus 2 equal to moles of k2 so4 plus moles of nh4 twice so4 right okay so suppose suppose x gram k2 so4 are present in 0 .649 gram of sample right okay so moles of k2 so4 equal to the we can write x over 174 .27.
04:30
Right? so here moves of nh4 twice so4 equal to we can write 0 .649 minus x over.
04:59
Here we can write 132.
05:02
0 .14.
05:07
So now move further and here now therefore we can write 4 .18 multiply not 1 8 only we can write here also 6 multiply with 10 to the power minus 3 equal to x x over 174 .27 plus now here we can write 0 .649 minus x over 132 .14.
05:54
So now here we will get 96 .39 equal to we can write write minus 4 .2 .13x plus 113 .101.
06:19
Okay...