Chapter 2, Problem IIISP

(a)

Interpretation Introduction

Interpretation:

The mineral fluorapatite has the formula ${\text{Ca}}_{\text{5}}{{\text{(PO}}_{\text{4}}\text{)}}_{\text{3}}\text{F}$.  Hypo, a substance used when photographs were developed chemically, has the formula ${\text{Na}}_{\text{2}}{\text{S}}_{\text{2}}{\text{O}}_{\text{3}}{\text{.5H}}_{\text{2}}\text{O}$.  Weddellite has the formula ${\text{CaC}}_{\text{2}}{\text{O}}_{\text{4}}{\text{.2H}}_{\text{2}}\text{O}$ and is involved in formation of kidney stones.  The ions and their charges in these three compounds has to be identified.

(b)

Interpretation Introduction

Interpretation:

The mineral fluorapatite has the formula ${\text{Ca}}_{\text{5}}{{\text{(PO}}_{\text{4}}\text{)}}_{\text{3}}\text{F}$.  Hypo, a substance used when photographs were developed chemically, has the formula ${\text{Na}}_{\text{2}}{\text{S}}_{\text{2}}{\text{O}}_{\text{3}}{\text{.5H}}_{\text{2}}\text{O}$.  Weddellite has the formula ${\text{CaC}}_{\text{2}}{\text{O}}_{\text{4}}{\text{.2H}}_{\text{2}}\text{O}$ and is involved in formation of kidney stones.  The molar mass of each compound has to be calculated.