Question

1 1.00 M 2.43 1.66 .77
2 .833 M .167 M .2004 3.94 3.68 .26
3 .500 M .500 M 1 4.67 4.03 .64
4 .909 M .909 M 1 5.72 5.08 .64
5 1.00 M 8.37 5.14 3.23


Determine which solutions (list number) would be expected to have any buffer capacity. Show how these solutions meet the criteria. Does the data after the addition of acid indicate buffer capacity for these solutions?

Answer 1

No.

Answer 2

i cant even decipher the task properly...

Answer 3

if u have a picture of the table, please attach that file, its nigh impossible to dissect the written table you gave us

Answer 4

somehow, thats worse, cant u save to image, or something?

Answer 5

print screen?!

Answer 6

the question is

Determine which solutions (list number) would be expected to have any buffer capacity. Show how these solutions meet the criteria. Does the data after the addition of acid indicate buffer capacity for these solutions?

Answer 7

ok, to solve this, first lets define buffer capacity

Answer 8

Buffer capacity is defined as the moles of an acid or base necessary to change the pH of a solution by 1, divided by the pH change and the volume of buffer in liters; it is a unitless number. A buffer resists changes in pH due to the addition of an acid or base though consumption of the buffer.

Answer 9

just to confirm, is one mol of HCl added?

Answer 10

ok, in basic terms, the buffer capacity, is how much the solution resists changing its ph by 1, this can be seen when the ph difference is low, such as solution 2

Answer 11

because the difference in ph is only .26, which is hardly any difference at all,

that means that it resisted the change in ph

do you know about specific heat?

Answer 12

water has a high specific heat, and requires a large amount of energy to increase its temp by 1 degree, whereas that same amount of energy would increase iron's temp by

Answer 13

10 or so

Answer 14

Determine which solutions (list number) would be expected to have any buffer capacity. Show how these solutions meet the criteria. Does the data after the addition of acid indicate buffer capacity for these solutions?


so the answer to this is number 2

Answer 15

similarly, when there is a buffer capacity, the change in ph will be resisted, and more HCl will be needed to increase the difference of PH

Answer 16

actually, looking at the data as a whole, solution 2, 3, and 4 have a buffer capacity, wheras solution 1 and 5 do not, for 2 reasons

Answer 17

for solution 5, it is quite obvious, because the ph difference is quite large, however when looking at solution one, it is much lower, however the initial ph, which is 2.43 is not much higher than the pH of HCl, so the % of change is much higher

Answer 18

do you understand what i'm saying?

Answer 19

actually sorry the mole that was added 3.0 M HCI WAS ADDED

Answer 20

but was the number of mols consistent for all solutions?

Answer 21

if it was, than it doesnt matter how many mols were added to each

Answer 22

THE ANSWER WOULD still be , solution 2, 3, and 4 have a buffer capacity, wheras solution 1 and 5 do not

Answer 23

do u understand why?

Answer 24

can i open a different post. I am going to close this one

Answer 25

ok

Answer 26

can you help me in a different post

Answer 27

sure, but im not positive whether solution 1 has any buffer capacity, jsut saying