Chemistry Help

Faerie

Faerie

VIP
Hi. I need help in Chemistry with Stoichiometry. My professor isn't the best and has assigned work that she hasn't taught before.

The question is....

13.33 cg of Barium Chloride is reacted with 135.2 mL of a 0.250 M sulfuric acid.

I balanced the equation
BaCl2(aq) + H2SO4(aq) --> BaSO4(s) + 2HCl(aq)
BaCl2 = A, H2SO4 = B, BaSO4 = C, HCl = D

I then converted 13.33cg A to grams of D (I got 4.667x10^-2 gHCl)
Then I converted 135.2mL B to grams of D (2.464x10^0 gHCl)
I found B to be the Limiting Reactant (LR)
I then converted from 135.2mL B to grams of C (7.888x10^0 gBaSO4)
Then, I took 135.2mL B to grams of A (7.039x10^0 gBaCl2)
I am stuck on how I find the remaining amount of BaCl2.
Also, I know it is original - reactant which I found to reactant when I went from B to A. I also converted 13.33cg A to g A (1.333x10^-1 gBaCl2)
How do I solve how much of BaCl2 is left over? Also, I'm pretty sure my previous calculations are right, but we use a specific PT when looking for molar mass so if you use a different one, your numbers might be off.
I think I solve it by taking the original which I believe to be the 1.333x10^-1 gBaCl2 and subtracting the reactant (7.039x10^0 gBaCl2) but I think this gives me a negative number and the answer cannot be negative.
 
Faerie

Faerie

VIP
Hi ok, Serin helped me find my error so I no longer need help uwu. Though, if anyone is good at chem or is currently taking it (even high school lvl) it would be real cool of you to add me on steam and possibly study with me :)
 
Okeas

Okeas

VIP
Damn... I learned all of this last year, then dumped it all out of my brain to make room for physics which I am currently taking. Love our amazing school system.
 
Cosmiverse

Cosmiverse

Member
I dunno if this is right but you WILL get a negative.
I got 0.0338 mol for Sulfuric Acid and 0.00064 mol of BaCl2. There IS no more BaCl2 in the reaction as I can see
 
Faerie

Faerie

VIP
I got the wrong LR (I didn't check my sigfigs) but thanks for the help. Though, I'm a tad confused on how to do a lot of this packet. My professor doesn't really teach and gives vague notes that don't help so again, if anyone is taking chem and wants to send me notes or worksheets please do. More than 70% of the class is failing (with a 64.9% and below; I have a 63% so I'm close to a C which is 65.0%) This class is way harder than any AP I've taken to so any worksheets or help would be greatly appreciated. I took chem in high school and got a B in it but I forgot almost everything and this class is basically the equivalent to a high school course so really if anyone can help please do.
 
P

Pump

I have an A in chem this is light work, send me the packet I will do it for MK11
 
Faerie

Faerie

VIP
Hi I was wondering if anyone could check my work on this problem. My sister thinks I did it wrong but i'm 95% sure I did it correctly. (She thinks you don't need to find the amount of left over Li in the problem

The question is : 12) 1.325 cg strip lithium reacts w/ 13.25 mg of magnesium nitrate.

I attached some photos of my work and final answers :)


IMG_1017 (1).jpg (Work)
IMG_1018 (1).jpg (Answers)
 
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