Once you have the moles of total acid in the lemonade powder sample, you need to

Question

Once you have the moles of total acid in the lemonade powder sample, you need to you determine how many moles came from the ascorbic acid in the lemonade. To do this you will use the %w/w that is ascorbic acid from experiment 2. If a sample of lemonade that you are analyzing weighs 54.20 g and you had determined in Experiment 2 that the lemonade powder was 0.42% w/w ascorbic acid, how many moles of ascorbic acid do you expect to be in this lemonade sample? Give your answer to four decimal places.

Explanation / Answer

ascorbic acid mass in the sample = 54.20 x 0.42 / 100

= 0.2276 g

ascorbic acid molar mass = 176.12 g/mol

moles of ascorbic acid = mass / molar mass

= 0.2276 / 176.12

= 1.2925 x 10^-3

  

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