Question

A solution contains an unknown mass of dissolved silver ions. When potassium chloride is added to the solution, a white precipitate forms. The precipitate is filtered and dried and then found to have a mass of 239mg .


what mass of silver was in the original solution? (Assume that all of the silver was precipitated out of solution by the reaction.)

Answer 1

I got to go, I'm sure @abb0t can help you with this.

Answer 2

Write and post the balanced equation.

Answer 3

i dont know how to start it but if you help me and provide the solution and anser, i will learn better as it is hard to communicate through this site

Answer 4

\[Ag ^{+}+KCl= AgCl +K ^{+}\]

Answer 5

is the anser 179 mg

Answer 6

i got it

Answer 7

can you help me one more

Consider a situation in which 235g of P4 are exposed to 272g of O2.

Answer 8

What is the maximum amount in moles of P2O5 that can theoretically be made from 235g of P4 and excess oxygen?

Answer 9

I got

235 g . . . . . . . . 538 g
P4 + 5O2 ---> 2P2O5
(123.9). . . . . . .(141.94) {g/mol conversion factors}
1.90 mol . . . . . 3.80 mol
. . |___1 to 2_____|
divide down from 235 to 1.90
ratio across to 3.80
multiply up to 538 g

Answer 10

How many moles is 235 g of P4 ?

Answer 11

is it 141.94

Answer 12

1.90 moles

Answer 13

So the maximum number of moles that could be produced is twice as many which is 3.80

Answer 14

ohh ok so 3.80 in anwer

Answer 15

yes

Answer 16

What is the maximum amount in moles of P2O5 that can theoretically be made from 272g of O2 and excess phosphorus?

Answer 17

. 272 g. . . 482.6 g
P4 + 5O2 ---> 2P2O5
. . . . . (32.00). .(141.94) {g/mol conversion factors}
. . . . 8.50 mol. . 3.40 mol
. . . . . .|__2 to 5__|
to 3 s.f. that's 483 g of P2O5

Answer 18

would it be 8.50

Answer 19

In Part A, you found the amount of product (3.80mol P2O5 ) formed from the given amount of phosphorus and excess oxygen. In Part B, you found the amount of product (3.40mol P2O5 ) formed from the given amount of oxygen and excess phosphorus.
Now, determine how many moles of P2O5 are produced from the given amounts of phosphorus and oxygen.

Answer 20

What is the question the problem asked?

Answer 21

What is the maximum amount in moles of P2O5
Is 8.5 moles the answer to the question "how many moles of P2O5"?

Answer 22

i got is

Answer 23

the answer i got sorry for bothering you

Answer 24

hey koay

Answer 25

what was the thoraticla yield

Answer 26

was it 3.40

Answer 27

a couple things u need to know, Ag + KCl ---> AgCl + K
since all the Cl bonded to K goes into AgCL
we need to see how many moles of thsi we have that is the same moles of KCL
as they have a 1:1 relationship

Answer 28

i dont know what question is this?