/sci/ - Science & Math

>>936760

Sigh... and here I am always helping bros out when they post questions.

>>936773
I don't know how to do it.

Perhaps copper nitrate?

Sorry, don't know much about inorganic reactions

is this in an aqueous solution?

>>936773
I was about to post the answer, then I refreshed and saw you getting all whiny. Now you get Beavis and Butthead.

>>936760
CuNO3 + H2

hmmmmm...i got no reaction from the reactivity series

>>936784

That was my assumption, but it's not correct.

>>936783
sweet Beavis and Butthead thread > homework thread

>>936784

This /thread

>>936795

Read >>936790

>>936790
well it would be Cu(NO3)2 + H2, is that correct?

>>936798

That's actually what I meant. That's wrong too. >_<

>Cu(s) + 4HNO3(aq) ——> Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l)

it makes copper nitrate

Perhaps a copper complex then, or unreactive.

>>936803

Can you tell me how to actually got that?

>>936790

Why is it wrong?

>>936808
>science

It forms copper nitrate and hydrogen gas you fuckwits

/thread

>>936812

>>936811

Because with that mole ratio, I'm unable to get the correct answer.

2Cu + 2HNO3 > 2CuNO3 + H2


/fucking thread you halfwit fucking retards

This had better be a troll thread.

If you wikipedia copper nitrate this exact reaction is listed.

Cu + 4 HNO3 → Cu(NO3)2 + 2 H2O + 2 NO2

>>936828
>>936803

But how would you balance/predict it knowing only the reactants?

>>936832

You just have to be comfortable with chemistry, when you look at enough reactions and know how mechanisms work, predicting simple molecule reactions gets pretty easy.

>>936843

So without knowledge of the reaction itself, you could have told me that Cu(s) + HNO3 was going to produce that specific reaction?

>>936841

No. Also, university student. Get out faggot.

>>936849

University student thats never taken chemistry before?

>>936849

Yes, when you think about it there are only really 3 things in this reaction.

Hydrogen, the nitrate ion, and the copper.

You know copper wont bond in any way with the hydrogen, so that means there is only one possible other arrangement of these besides the given starting materials.

Now that you know that, you have to make sure that the charge is balanced on the copper nitrate, which is what leads you to the decision that there are two nitrate ions per copper.

>>936857

Oddly, I got an A in high school chemistry, but alas; I just don't recall how to predict this specific type of reaction.

>>936859

Assuming that, I could come up with:

Cu + 2HNO3 -> Cu(NO3)2 + H2

How would you differentiate between that and the copper nitrate reaction?

>>936877

Personally i'm confused with the reactions being given here.

Acid + metal = Salt + hydrogen gas like you've written.

I think Wikipedia has it wrong.

>>936889

Wikipedia is actually correct. My university uses an online homework system for certain portions of the curriculum (in which you have 5 attempts to get the answer.)

The correct answer was indeed:
>Cu(s) + 4HNO3(aq) ——> Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l)

Most people would (incorrectly) predict:
>Cu(s) + 2HNO3(aq) -> Cu(NO3)2(aq) + H2(g)

I don't understand how you would reach the first solution though.

Can both Cu (I) & (II) exist as a solid?

>>936889

Here.

>Cu + 4 HNO3 → Cu(NO3)2 + 2 H2O + 2 NO2

Is wrong. The copper has to be a metal carbonate for that reaction to take place, which it clearly isn't.

The actual reaction is

Cu +2HNO3 -> Cu(NO3)2 + H2

>>936903

Rubbish, it's not right.

it's not balanced, but it would yield copper nitrate and hydrogen gas

>>936907

Cu (I) and Cu (II) are used to describe the ions Cu+1 and Cu+2 respectively. I believe Cu(s) will always become Cu+2 + 2e- as that is it's natural state (unless altered by lasers/fission/etc I don't even.)

>>936911

Refer to >>936903

>>936926

Gracias

>>936931

my acs exam score was 99th percentile bitch

because i know what (s) means

>>936931

You are now aware that it's Cu(s), not Cu+2.

>>936911


Alright so i'm completely wrong, but I have no idea why.

>>936938
>>936941

Well played guys. I lol'd.

>>936938 here

lol niggertits magoo is an moran

gave a wrong answer then bragged about acs score and then deleted post like a beyotch

If these are all in aqueous solution then nothing happens.

Just look at the ionic equation...

(Cu)2+(aq) + 2H+(aq) + 2(NO3)-(aq) ----> (Cu)2+(aq) + 2H+(aq) + 2(NO3)-(aq)

Nothing happens and there is no net ionic equation for this because the only other ionic compound that can form, copper nitrate, is soluble in water - if it wasn't soluble in water then you would have a precipitation reaction.

You might also get a redox reaction if copper was not already oxidized (ergo not in solution) and H+ could oxidize copper but it can't.. so nothing happens. Silver nitrate would do it, though.

I didn't use google to find this information, bitches don't know bout my ACS exam score.

>>936938
Edit:ok so copper is (s), no reaction happens.

>>936952

yes a reaction will happen, metallic copper will readily dissolve in pretty much all of the common strong acids, including nitric.

>>936952

I'd just like to state that you're an idiot.

>>936952

Copper is still solid... not an ion you fucking idiot.

>this thread

no