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Anestetic [448]
2 years ago
12

Someone help me with this question with steps please!!!

Chemistry
2 answers:
hoa [83]2 years ago
8 0
260g explanation in the pic
IRINA_888 [86]2 years ago
6 0
What they said ^^ she’s right
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An aqueous solution containing 10 g of an optically pure compound was diluted to 500 mL with water and was found to have a speci
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Answer:

<u>Optical purity = 76.9231 %</u>

<u>Specific rotation of mixture = - 97.6923 °</u>

Explanation:

The mass of the racemic mixture = 3 g

It means it contains R enantiomer = 1.5 g

S enantiomer = 1.5 g

Amount of Pure R = 10 g

Total R = 11.5 g

Total volume = 500 mL + 500 mL = 1000 mL = 1 L

[R] = 11.5 g/L

[S] = 1.5 g/L

Enantiomeric excess = \frac {Excess}{Total\ Concentration}\times 100 = \frac {11.5-1.5}{11.5+1.5}\times 100 = 76.9231 %

<u>Optical purity = 76.9231 %</u>

Also,

Optical purity = \frac {optical\ rotation\ of\ mixture}{optical\ rotation\ of\ pure\ enantiomer}\times 100

Optical rotation of pure enantiomer = −127 °

76.9231=\frac {optical\ rotation\ of\ mixture}{-127^0}\times 100

<u>Specific rotation of mixture = - 97.6923 °</u>

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2 years ago
Which of the following is represented by the number of significant figures in a quantity? A) estimation B) precision C) accuracy
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