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Topic: Icho problems  (Read 4528 times)

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Offline abrahamsaynes

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Icho problems
« on: June 29, 2015, 02:05:04 PM »
 I need help solving this problems, can you show me calculations. ??? ???

How many litres of CO2 will approximately be evolved in the reaction of 18 g of
potassium hydrogen carbonate with 65 g of 10 % sulphuric acid? 
A)   1,        B)   2,        C)   3,        D)   4,        E)   5.
Answer c)

What must be the minimum concentration (% by mass) of 1 kg of a potassium hydroxide
solution for a complete neutralisation of 3.57 moles of nitric acid? 
A)   5 %,   B)   10 %,   C)   15 %,   D)   20 %,   E)   25 %.
Answer d)

 How many litres of air are approximately required for complete combustion of 1 litre of
ammonia? 
A)   1,        B)   2,        C)   3,        D)   4,        E)   5.
Answer D)

Online sjb

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Re: Icho problems
« Reply #1 on: June 29, 2015, 02:14:48 PM »
Step 1, what is the balanced equation?
« Last Edit: June 29, 2015, 03:07:29 PM by Arkcon »

Offline abrahamsaynes

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Re: Icho problems
« Reply #2 on: June 29, 2015, 02:18:40 PM »
*MOD Edit -- Quote of a quote of the OP removed*

H2SO4 + 2KHCO3 ---> K2SO4 + 2CO2 + 2H2O
« Last Edit: June 29, 2015, 03:08:10 PM by Arkcon »

Online sjb

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Re: Icho problems
« Reply #3 on: June 29, 2015, 04:14:40 PM »
MOD Edit -- Quote of a quote of the OP removed*
w
H2SO4 + 2KHCO3  :rarrow: K2SO4 + 2CO2 + 2H2O

OK, so how many moles of potassium hydrogen carbonate is there? How many moles of acid? Which is the limiting reagent?

Offline abrahamsaynes

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Re: Icho problems
« Reply #4 on: June 30, 2015, 01:48:33 PM »
MOD Edit -- Quote of a quote of the OP removed*
w
H2SO4 + 2KHCO3  :rarrow: K2SO4 + 2CO2 + 2H2O

OK, so how many moles of potassium hydrogen carbonate is there? How many moles of acid? Which is the limiting reagent?
i dont know thats all what the problem says.

Offline Arkcon

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Re: Icho problems
« Reply #5 on: June 30, 2015, 02:17:02 PM »
i dont know thats all what the problem says.

Please avoid excessive quoting.  There's no need to quote your own post, along with someone else's post, when you respond again.  The forum is a thread, we already have your old post.  Did you notice, I only quoted you latest post?  Do that next time please.

I've already told you once before, here: http://www.chemicalforums.com/index.php?topic=80943.msg294731#msg294731  This is a learning forum, we will give you hints, and expect to see some work, using those hints.  When sjb: wrote:

Quote
OK, so how many moles of potassium hydrogen carbonate is there? How many moles of acid? Which is the limiting reagent?

He meant for you to calculate moles, based on the information you have been given.  Can you do this?  If you can, do that in your next post.  With posting a:

Quote
Hahahahaha yeah

Like you did here:  http://www.chemicalforums.com/index.php?topic=80943.msg294821#msg294821  That's not a useful use of our forum space.
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

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