1. The formula of a compound can be determined if the ratio of the number of mol

Question

1. The formula of a compound can be determined if the ratio of the number of mols of each of the elements in the compound is known. An insoluble precipitate of silver chloride forms when a solution of potassium chloride is added to a solution of silver nitrate. In a 0.4651 g sample of silver chloride, there is 0.3500 g of silver. A)How many mols of silver are there in the compound? B)How many grams of chloride are there in the compound? C)How many moles of chloride are there in the compound? D) Small whole number ratio of silver : mols of chloride is what? E)The simplest formula of silver chloride is what? 2. Silver forms an insoluble sulfate. In an experiment, 24.2 ml of 0.12 M silver nitrate required 9.70 ml of 0.15 M sodium sulfate to precipitate all of the silver. What is the simplest formula of this sulfate of silver?

Explanation / Answer

A) moles of silver = mass/molar mass = 0.35/107.8 = 0.003247

B) grams of chlorine = 0.4651-0.35 = 0.1151 gm

C) moles o f Cloride ions = 0.1151/35.45 = 0.003247

D) ratio of silver moles to chlorine = 1:1

E) AgCl

F) Ag2SO4 is formula

since silver moles = 0.0242x0.12 = 0.0029, moles of SO42- sulphate = 0.0097 x0.15 = 0.001455

hence ratio is 0.0029/0.001455 = 2:1 hence 2Ag per 1SO42- hence Ag2SO4

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.