Question

help me please

Answer 1

im here

Answer 2

where the Q

Answer 3

there no pic nd sorry i dont know the answers for you

Answer 4

hey are quastions i have to solve for

1. 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?


2. which solution (list number) has the best buffer capacity and why?

3.Explain why solution #1 is acidic and #5 is basic. Show chemical equations to support your answer.

Answer 5

http://www.dartmouth.edu/~chemlab/chem3-5/acid1/full_text/chemistry.html

Answer 6

or this might help you

http://www.applichem.com/fileadmin/Broschueren/BioBuffer.pdf

Answer 7

click this link and read it it should help you

http://www.applichem.com/fileadmin/Broschueren/BioBuffer.pdf

Answer 8

Do you know what a buffer is?

Answer 9

i didn't mean go copy and paste something from another site
https://research.chemistry.ohio-state.edu/reel/research-modules/environmental-chemistry/methods/buffer-capacity/

Answer 10

in your own words, what is it? how do you make one?

Answer 11

or how does it resist a change in pH?

Answer 12

I dont think you know what you're talking about.

Watch this video and the next on buffers and pH (it'll play automatically)
https://www.youtube.com/watch?v=l5fk7HPmo5g&list=PLllVwaZQkS2op2kDuFifhStNsS49LAxkZ&index=68

Answer 13

more or less. you didn't watch the whole video though.

I mean, you should read more about this before you start your homework. It's impossible to try to do something you dont understand, so i think that should be your first step.

1. 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?

Knowing that you need a weak base or acid and their conjugates to make a buffer, you can answer #1.

This link has specifics on buffers http://www.unf.edu/~rstern/BufferLabspr07.pdf

Answer 14

is the answer to number 1 then solution 1,2,3,and 4 would be expected to have a buffer capacity. the reason for this is because they resisted the change of pH. The data after the addition of acid helps indicate the buffer capacity of these solutions

Answer 15

You have the concept correctly, if the pH didn't change drastically, the solution is a buffer.

Answer 16

the definition of a buffer is just a solution of a weak acid in a equilibrium with its conjugate weak base

Answer 17

right, so the answer to 1 should be what you chose because you have the concept correctly.

Answer 18

2. which solution (list number) has the best buffer capacity and why?

This would be the one with the least change when the same amount of acid was added throughout.

Answer 19

Which solution (list number) has the best buffer capacity and why?

Would it be solution 2 that has best buffer capacity beacuse it resist the pH hte most

Answer 20

sounds good

Answer 21

wait I forgot to solve number 3

3.Explain why solution #1 is acidic and #5 is basic. Show chemical equations to support your answer.

Answer 22

i know for solution 5, th 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 23

he pH change is for solution umber 5 is 3.23 meaning that it did not resist the change of pH

i also know that the the pH change was very large, although the inital bit of the solution was large, (8.37) 38.6% of the solution became more acidic,

Answer 24

it's acidic if pH<7

basic if pH>7

Answer 25

no need to deal with the change in pH, they're asking about the initial solutions (prior to adding base or acid).

Answer 26

so should i say solution 1 is acidic because the initial solution prior to adding base or acid is 2.43.

Solution 5 is basic because the inital solution prior to adding base or acid is 8.37

Answer 27

yep, you can also use the formulas (given) to write what occurred.

Answer 28

what formauls

Answer 29

ok the HC2H302

AND THE C2H302

Answer 30

but how do i do this

Answer 31

Toxic, solution 1 is acetic acid. HA and the the equation is HA<--> H+ + A-.
5 is basic because A-+H2O <-> HA+OH-. This is the equation of hydrolysis of the conjugate base of a weak acid. They want you to write these two equations to show you understand.

Answer 32

Subsittute A- with the proper formula for acetate

Answer 33

I gtg... good luck. Read the book.

Answer 34

i dont understand

Answer 35

what is this HA and the the equation is HA<--> H+ + A-.
and yopu said to subsittute A- with the proper formula for acetat

Answer 36

is it C2H302

Answer 37

HA<--> H+ + C2H302 for #1

and number 5 will be C2H302 +H2O <-> HA+OH-.

Answer 38

@Preetha

Answer 39

Yesss!