Question

WILL MEDAL AND FAN!!

1. Balance the chemical equation between Mg and HCl.

2. What type of reaction occurs between Mg and HCl?

3. Show how you would calculate the % yield of hydrogen if 40.0 grams of magnesium react with an excess of nitric acid producing 1.70 grams of hydrogen gas. Mg + 2 HNO3 ---> Mg(NO3)2 + H2.

Answer 1

an you show your work?

Answer 2

I don't understand any of this but you have to show your work, yeah. This isn't my strong place in Chemistry right now. @Photon336

Answer 3

The compound that formed is MgCl2

Answer 4

that should make you think that " oh I got 2Cl in my product, so I should use 2HCl to make my product" and this is exactly what the reaction tells you

Answer 5

Which one are you answering? @caozeyuan

Answer 6

the first one

Answer 7

So the balanced equation would be Mg + 2HCl ---> MgCl2 + H2 ?

Answer 8

Fantastic!

Answer 9

What kind of reaction happens between acid and metal. Hint: there are several answers, and I dont know which one your teacher wants

Answer 10

I feel like it might be single replacement reaction/redox reaction.

Answer 11

you are correct, it is also acid base though. Mg turns into Mg2+, which means it gives 2 electrons, things give electrons are called lewis base. H+ turns to H2 so it gets 1 electron, things get electrons are called lewis acid

Answer 12

Okay yay! :) And I have noooo idea how to do #3.

Answer 13

if you are asked to calculate TY ( stands for theoretical yield), you should first decide which one is you LR ( stands from limiting reagent) which is the first chemical that is goona run out

Answer 14

% yield is AY/TY if you havent know that already

Answer 15

I have to go but I think I can figure it out. Thanks sooooo much for your help, I appreciate it!!

Answer 16

I will post a solution soon so keep an eye out for that. If you can stay for 5 more min that would be great

Answer 17

but if you cant just come back and check your answe

Answer 18

Mg is your LR, since the other is in excess

Answer 19

now next step is come up with how many moles do I have in my x gram of LR. so If you have x gram of substance with y gmol^-1 as the mm. the number of moles (=n) is x/y

Answer 20

then we want to know how many moles product can we get out. So in this case we have a 1 to 1 relationship of reagent to product which means we can make n moles of product out of our n moles of reagent.

Answer 21

no we have TY=n*molar mass of product. so since we calculated n and molar mass is given, we know the TY for this reaction, so according to formula above, you have the % yield