Question

Help with reaction

Answer 1

What is your question my friend?

Answer 2

How many grams of pottasium chloride are produced from:
\[\Huge{2K+Cl_2\rightarrow2KCl}\]
If I have \(2.5g\) of pottasium and excess chlorine?

Answer 3

I'm not sure, cause both sides use pottasium, @korosh23 :(

Answer 4

Do not worry I help you, just give me few minutes to do the calculations and explain it to you.

Answer 5

Thank you!

Answer 6

Ok. Good job for writing the chemical equation and balancing it. This makes our work a lot easier. :)

Answer 7

Woah. How did you get all that?

Answer 8

Look at it carefully and tell me the part you do not understand.

Answer 9

I understand what you are trying to do. I just do them individually ;)

Answer 10

I find the Molar Mass first from the periodic table. Then, find the moles of pottasium. I then know the moles of KCL, using that and its molar mass, I find the amount of grams needed.

Answer 11

@Ahsome lots of practice my friend :D
It is a good idea to do it individually, which I used to, but it takes time and space, this way is the best to save time on test and quizzes

Answer 12

Fantastic you are a fast learner!

Answer 13

That makes sense @korosh23 :)
How would we solve if if we said the total mass of pottasium in the reaction is 2.5g? Find the mass of Cl2?

Answer 14

Well you do the same thing. Except using the molar mass of chlorine from the periodic table.

Answer 15

But all the pottasium is on the left and right side?

Answer 16

When you say the total mass of pottasium, it only means the one you have on the left side.

Answer 17

That does not include the mass of the pottasium in the pottasium chloride.

Answer 18

It is only potasium!

Answer 19

One of the question says its on both sides (B) ). How would we solve then?

Answer 20

It does not make sense.

Answer 21

I am in grade 11 and I have never encountered such a question before.

Answer 22

Really? I am in Grade 11 aswell ;) One of the questions says that the total number of Pottasium in Grams is 12, on both sides (i.e. K + KCL (The K part) is 12). Solve for Cl2

Answer 23

Yes! ;) it does not matter because you can still find the mass of chlorine on left by only using potassium mass. Sometimes they give you such questions to mix you up. You know.

Answer 24

How would you do that @korosh23?

Answer 25

for chlorine?

Answer 26

Yah

Answer 27

was the mass 2.5 or 12g ?

Answer 28

12g of Pottasium for both sides

Answer 29

I had a internet problem. Wait 1 min

Answer 30

Sure :)

Answer 31

Is there any other question my friend? I have to go.

Answer 32

@Ahsome

Answer 33

Wait... Just reading your answer...

Answer 34

sure.

Answer 35

How do you know there is 12g of only K?

Answer 36

Because it is mentioned 12 g of k on both sides. That means 12 g K on left and 12 g on right. Sometimes they twist these questions to make you to do a mistake others do.

Answer 37

Oh, I see. I thought they meant the TOTAL ammount of pottasium is 12, not that 12 is on left & right. Can you solve if they say its on both sides together?

Answer 38

Believe me for me in this grade, I have never ever seen a question saying something like that. It would be impossible!

Answer 39

Oh, ok. Phew ;)

Answer 40

Ok thank you for the medal and fan testimonial. Remember chemistry needs regular practice. Practice makes perfect. Good luck! :)

Answer 41

Thanks @korosh23 :)