What is the activity coefficient of Co(no3)2 at concentration of 0.7m per 1000g assuming the temperature in at 298K and the compound is dissolved in water?

Answer 1

Chemistry is the study of matter, including its composition and structure, its

physical properties, and its reactivity. There are many ways to study chemistry, but,

we traditionally divide it into five fields: organic chemistry, inorganic chemistry,

biochemistry, physical chemistry, and analytical chemistry.

Analytical chemistry is often described as the area of chemistry responsible

for 1. Characterizing the composition of matter, both qualitatively and quantitatively,

Improving established analytical methods, 3. Extending existing analytical

methods to new types of samples, and 4. Developing new analytical methods for

measuring chemical phenomena.

2. Measurements in Analytical Chemistry

Units of Measurement

A measurement usually consists of a unit and a number expressing the quantity

of that unit. We may express the same physical measurement with different units,

which can create confusion.

To ensure consistency, and to avoid problems, scientists use a common set of

fundamental units. These units are called SI units after the Système International

d’Unités. Sometimes it is preferable to express measurements without the

exponential term, replacing it with a prefix (Table 1.1). A mass of 1×10–15 g, for

example, is the same as 1 fg, or femtogram