1. If a mixture contains 0.395 g NaCl, 0.470 g NH.CI, &0.851 g of SiO;, with due
ID: 590734 • Letter: 1
Question
1. If a mixture contains 0.395 g NaCl, 0.470 g NH.CI, &0.851 g of SiO;, with due reg significant figures, what is the mass percent of NaCI in the mixture? Show all wo rk & reasoning. 2. You start with 18.34 g sample of a mixture containing Si0, NaCl, and NH.CI If after subliming rcent of NH.C away the NH.CI, you have 3.27 grams of sample remaining, what was the mass pe in the original sample? Show all work. 3. What is the name and chemical formula of the acid present in vinegar? Calculate the molarity of an acetic acid solution if 32.14 mL of this solution are needed to neutralize 36.56 mL of 0.2825 M sodium hydroxide. 4. Overtime aspirin can breakdown to form salicylic acid and acetic acid. This reaction occurs more rapidly if moisture is present and/or the aspirin is stored in a warm location. Why is iron(ll) chloride used to test the purity of aspirin? 5.Explanation / Answer
1) total mass of mixture= (0.395+0.470+0.851)g
= 1.716g
Given mass of nacl= 0.395g
So, mass percent of nacl= (mass of nacl/ total mass of mixture)* 100
= (0.395g/1.716g)*100
= 23.02 %
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