1 answer

Post La DUI LUI U UUDLUNS What is the biggest factor that causes vields of alum...

Question:

Post La DUI LUI U UUDLUNS What is the biggest factor that causes vields of alum in this experiment to be low? using too much
c. What is the molarity of KOH after reaction is complete? 3. What is the mass percent of water in KAI(SO4)2 12H20? 4. A stud
Post La DUI LUI U UUDLUNS What is the biggest factor that causes vields of alum in this experiment to be low? using too much Hasoy whold cause the yield to be in 2. A student reacted 1.01 g of Al with 25.0 mL of 2.00 M KOH according to the following reaction: 2Al(s) + 2KOH(aq) +6H2O(0) ► 2KAI(OH)4 + 3H2(g) a. How many moles of KOH were required to react with all of the aluminum? b. How many moles of KOH remain in the 25.0 mL of solution after reaction is complete? c. What is the molarity of KOH after reaction is complete? What is the mass percent of water in KAI(SO4)2-12H20?
c. What is the molarity of KOH after reaction is complete? 3. What is the mass percent of water in KAI(SO4)2 12H20? 4. A student obtained 12.1 g of KAI(SO4)2-12H2O in this experiment. He decided to dry the alum by heating it strongly. Unfortunately he also drove off the waters of hydration. What is the mass of his remaining anhydrous salt? 5. I. M. Fumblefingers was running late in lab. He collected his alum on a piece of filter paper and then stored the paper and alum 5 days until the next lab. When he came in the filter was brittle and fell apart quite easily. Why did this occur?

Answers

@ Experiment not given. ② here loog Ae & 25mL 2.0m KoH given. 240 +2ko4 + 6tho - KAl(OH)4 +3th (a) Mass of Al available = 1.0

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