Purity and separating mixtures

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Question 23

Easy

A student synthesises a sample of benzoic acid and wants to assess its purity by measuring its melting point, $TexpT_{\text{exp}}$ (in $∘C^\circ\text{C}$ ). The literature melting point of pure benzoic acid is $∘C122.4\ ^\circ\text{C}$ .

Which equation correctly represents the percentage difference between the student's experimental value and the literature value?

$difference=100×Texp−122.4Texp\text{Percentage difference} = 100 \times \frac{T_{\text{exp}} - 122.4}{T_{\text{exp}}}$

$difference=100×Texp−122.4122.4\text{Percentage difference} = 100 \times \frac{T_{\text{exp}} - 122.4}{122.4}$

$difference=Texp−122.4122.4\text{Percentage difference} = \frac{T_{\text{exp}} - 122.4}{122.4}$

$difference=100×122.4−TexpTexp\text{Percentage difference} = 100 \times \frac{122.4 - T_{\text{exp}}}{T_{\text{exp}}}$

Purity and separating mixtures

Question 23

Purity and separating mixtures Questions

Purity and separating mixtures

Question 23

Purity and separating mixtures Questions