Question

Determine whether each of the errors listed would make the value of the gas constant, R,

a) lower b) higher or c) cause no change

Zn (s) is contaminated with Al(s)
(Write a balanced equation for the reaction between Al (s) and HCl (aq))

Answer 1

@abb0t get you fat a$$ in here

Answer 2

ahaha

Answer 3

Al + HCl \(\rightarrow\) AlCl\(_3\) + H\(_2\)

Answer 4

technically, Al is more reactive than Zn, and it can remove the proton

Answer 5

2Al + 6HCl \(\rightarrow\) 2AlCl\(_3\) +3H\(_2\)

Answer 6

Well, yeah. I don't think you deal with solid-phase HCl

Answer 7

It's aqueous.

Answer 8

Good night kids ... Im out
pls behave urselves

Answer 9

But our experiment was to find the ideal gas constant by making a bath, and measuring the volume and pressure of the H\(_2\)(g) and H\(_2\)O(g) present in the glass tube.

Answer 10

aqueous just means it was disollved in water.

Answer 11

So, you have HCl\(\sf _{aq}\) \(\leftrightharpoons\) H\(^+\) + Cl\(^-\)

Answer 12

Yeah.

Answer 13

as well as 298 K?

Answer 14

And by definition, to find R, you can rearrange the ideal gas law formula: \(\sf \color{red}{PV = nRT} \Rightarrow \frac{PV}{nT} = R\)

Answer 15

WHICH MEANS, that this ratio is constant

Answer 16

But we found everything with respect to H\(_2\).

Answer 17

Yeah, so use daltons law to find it for H\(_2\) then.

Answer 18

I'm actually confused right now. I don't think you've given me enough info or background to really help. I'm just spitting out stuff based on what you're telling me as we go on :P

Answer 19

There we go, that was my lab.

Answer 20

Ohh. I see.

Answer 21

and the question that I was asking about was a.

Answer 22

So you're basically calculating each variable in the ideal gas constant here, experimentally. So you want to find pressure, volume, under the given temperature!

Answer 23

Theyre already found, one sec,

Answer 24

Well, it is dependent on mass, since you have PV = nRT
and to find n it's mass over molar mass

Answer 25

I asked my professor about using the number of moles to determine the change in R, but she told me since Im still using the same amount of zinc for the experiment, it does not effect R.

Answer 26

Yeah, your explanation seems right.

Answer 27

I am not going over all the calculations. Lol Too much for me right now.

Answer 28

When is your thing due?

Answer 29

tomorrow -.-

Answer 30

just didthe experiment today lol

Answer 31

that sux. welp, it's only 10 lol.
i'm a fraid i wasn't much help. Gen Chem is not my forté

Answer 32

neither is p-chem, which is kind of what you're doing to some respect.

Answer 33

mayb @Kainui can help u more.

Answer 34

But theoretically, if zinc is contaminated with aluminum, and zinc is what produces the H\(_2\) gas, then comparing the two equations with zinc reacting with HCl and Al reacting with HCl, wouldnt the volume of H\(_2\) also lower R?

Answer 35

If what I asked even makes sense. Haha

Answer 36

It's a 3:1...hm

Answer 37

I guess I'll try figuring out what you're asking lol

Answer 38

for c, I know if H\(_2\) is soluble in water, then the volume of H\(_2\)O will increase, H\(_2\) will decrease, and therefore the gas constant R will decrease as well.

Answer 39

so what is the question here x.x