   Chapter 2, Problem 82PS

Chapter
Section
Textbook Problem

Calculate the mass percent of titanium in the mineral ilmenite, FeTiO3. What mass of ilmenite (in grams) is required if you wish to obtain 750 g of titanium?

Interpretation Introduction

Interpretation:

The mass percent of titanium in FeTiO3 and the mass of FeTiO3 required to obtain 750g  of titanium metal are needed to be calculated.

Concept introduction:

• Mass percent of elements of a compound is the ratio of mass of element to the mass of whole compound and multiplied with hundred.
• Equation for finding molar mass from mass of a molecule and number moles is,

Molarmass=MassingramsNumberofmoles

• Molar mass of a molecule can be calculated from its molecular formula by taking the sum of atomic masses of all the elements present in it.
Explanation

The molar mass of FeTiO3 is 15.71g/mol .

Mass percent of elements of a compound is the ratio of mass of element to the mass of whole compound and multiplied with hundred.

Therefore,

The mass percent of Ti in FeTiO3 is,

47.867gTi151.71gFeTiO3×100%=31.55%Ti

Mass percent of an element means, 100g of compound contains that mass percent of an element in grams

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