# In the first step of silicon purification, a reaction is brought about between the impure silicon and chlorine.

Hi Could someone please check my calculations for the question below:

2. In the first step of silicon purification, a reaction is brought about between the impure silicon and chlorine. Pure silicon is then used, in the computer industry, for the manufacture of microchips.

Si + Cl2 = SiCl4 (unbalanced equation)

Si + 2Cl2 = SiCl2

1 mol 2 mol 1 mol

Given that the silicon is 92% pure, calculate the theoretical yield percentage if 1.0 t of impure silicon produces 2.33 t of silicon (IV) chloride.                            (6 marks)

Molar Mass of SiCl4 = (28.9 +4 x 35.45) = 169.90 g/mol

Molar Mass of Si = (28.09) g/mol

Moles of SiCl4 = 1.0 x 10^6 g

169.90 g/mol

= 0.005885 x 10^6 mol or 5.885 x 10^3 mol

Number of moles of Si = 5.885 x 10^3 mol x1   = 5.885 x 10^3mol

1

Mass of Si = 5.885 x 10^3 mol x 28.09 g/mol = 165.309 x 10^3 g

= 1.65309 x 10^5 g

Yield% for Si = 2.3 x 10^6 g / 1.65309 x 10^5 g

= 3.80210 x 10^1 x 100 / 92 or 4%

## 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:
\$26
The price is based on these factors:
Number of pages
Urgency
Basic features
• Free title page and bibliography
• Unlimited revisions
• Plagiarism-free guarantee
• Money-back guarantee
On-demand options
• Writer’s samples
• Part-by-part delivery
• Overnight delivery
• Copies of used sources
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.

### 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.

### 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.