If the percent yield for the following reaction is 65.0%, how many grams of KClO3 are needed to produce 42.0 g of O2? 2 KClO3(s) → 2 KCl(s) + 3 O2(g)

##”165 g KClO”””_3##

Once again, start with the balanced chemical equation for this

##color(red)(2)”KClO”_text(3(s]) -> 2″KCl”_text((s]) + color(blue)(3)”O”_text((g])##

Notice that you have a ##color(red)(2):color(blue)(3)## between potassium chlorate, ##”KClO”””_3##, and oxygen gas, ##”O”””_2##.

This means that for a reaction that has an 100% , every two moles of potassium chlorate will produce three moles of oxygen gas.

Keep this in mind.

So, you know that your reaction must produce ##”42.0 g”## of oxygen gas. Use oxygen gas’ molar mass to find how many moles must be produced

##42.0color(red)(cancel(color(black)(“g”))) * (“1 mole O”””_2)/(32.0color(red)(cancel(color(black)(“g”)))) = “1.3125 moles O”””_2##

So, how many moles of potassium chlorate would you need If the reaction had an 100% ?

Use the aforementioned mole ratio to find

##1.3125color(red)(cancel(color(black)(“moles O”_2))) * (color(red)(2)” moles KClO”””_3)/(color(blue)(3)color(red)(cancel(color(black)(” moles O”””_2)))) = “0.875 moles KClO”””_3##

However, you know for a fact that the percent yield of the reaction is not 100%, but 65.0%. This means that you will need to use more potassium chlorate to produce this much oxygen gas.

Percent yield is defined as the actual yield of the reaction divided by the theoretical yield of the reaction.

##”% yield” = “actual yield”https://studydaddy.com/”theoretical yield” xx 100##

You know that the reaction’s actual yield is 42.0 g of oxygen gas, which means that the theoretical yield must be

##”65.0%” = “42.0 g”https://studydaddy.com/”theoretical yield” xx 100##

##”theoretical yield” = (“42.0 g” * 100)/65 = “64.6 g”##

This means that you need to find how many grams of potassium chlorate would theoretically produce 64.6 g of oxygen gas.

Once again, use oxygen’s molar mass and ratio that exists between the two

##64.6color(red)(cancel(color(black)(“g O”_2))) * (“1 mole O”””_2)/(32.0color(red)(cancel(color(black)(“g O”_2)))) = “2.019 moles O”””_2##

This means that you need to use

##2.019color(red)(cancel(color(black)(“moles O”_2))) * (color(red)(2)” moles KClO”””_3)/(color(blue)(3)color(red)(cancel(color(black)(” moles O”””_2)))) = “1.346 moles KClO”””_3##

moles of potassium chlorate. Finally, use the compound’s molar mass to find how many grams would contain this many moles

##1.346color(red)(cancel(color(black)(“moles KClO”””_3))) * “122.55 g”/(1color(red)(cancel(color(black)(“mole KClO”””_3)))) = color(green)(“165 g KClO”””_3)##

Calculate Your Essay Price
(550 words)

Approximate price: $22

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
The price is based on these factors:
Academic level
Number of pages
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more

Order your essay today and save 10% with the coupon code: best10