Microsort PowerPoint- / Oscertoliotor Co inne Vi CheggStudy l Guided S X DMicra
ID: 1037191 • Letter: M
Question
Microsort PowerPoint- / Oscertoliotor Co inne Vi CheggStudy l Guided S X DMicra Son Powe Point × N Lecture 26 50lutions. c PowerPoint Presentation C Secure I https://o u/che134-1oscerfolio/cventer.php How many mg of Caco correspond to your answer for question 5? Use 100.1 g/mol as the molar mass of CaCO3. Enter a numeric answer to THREE significant figures. Do not include units. Question 6 Enter Your Answer 128 128 Correct If one antacid tablet contains 500 mg of CaCO3, what percentage of the tablet will provide the mass of Question 6? See the appropriate slide of the posted lecture notes, for an example. DO NOT enter the approximate answer of 1/4. Your answer may be slightly more or less Enter the actual numerical percent that you calculate. Question 7 Enter a numeric answer only, to TWO significant figures. Do not include the percent sign. Enter Your Answer:0 260 0.26 Incorrect You wll work alone In this exerclse, but you begin by dividing an antacld tablet between yourself and one other person. Weigh one tablet on the analytical balance. Both people must record the total mass in their notebooks. Grind the tablet into a fine uniform powder. Then divide the powder between you. Do this by eye, do not weigh the powder at Question 8 this point. Your half of the powder will be used for two titrations with the EDTA If the total mass of the entire solid tablet, before grinding and separating, is 0.7645 g, and you need about 1/4 of this amount for your first titration, what mass (g) of powder should you attempt to weigh out? Enter a numeric answer to FOUR significant figures. Do not include units. Enter Your Answer: 0.1911 .1911 Correct Weighing by difference you put an actual mass of 0.1888 g of powder into a 250 mL Erlenmeyer flask ?Osuerfolio for Corin. 7:20 PM ?20 4/2/2018 I Inbox Gmail 2 .Explanation / Answer
Since problem 6 has been solved already , let me help you out with the next
Ans 7 :
The mass of CaCO3 is 128 mg
and the mass of CaCo3 in antacid tablet is 500 mg
So the percentage amount of tablet that will provide 128 mg will be :
= (128 / 500) x 100
= 26