Question

the specific heat of a metal A is found to be 0.03.Is equivalent mass is 69.99. calculate the valency and exact atomic mass of an element​

Answer 1

Answer:

Atomic mass = 6.4 / specific heat  = 6.4 / 0.03 = 213.33

ANd, Equivalent weight = Atomic mass / Valency

So, valency = Atomic mass / Equivalent weight  

         = 213.33/69.99 =3 ( approx.)

Answer 2

Given:

specific heat =  0.03

equivalent mass = 69.99

Find valency and exact atomic mass of an element​=?

(1) First determine the value of valency.

For valency first find the value of atomic mass

• Atomic mass × Specific heat = 6.4

       $Atomic\ mass=\frac{6.4}{specific\ heat}$

       $Atomic \ mass=\frac{6.4}{0.03}$

       Atomic mass = 213.3

• Atomic mass=Equivalent mass ×valency

         $valency=\frac{Atomic \ mass}{Equivalent\ mass}$

         $valency=\frac{213.3}{69.99}$

         valency=3.04 = 3.04 ≈ 3

(2) For determine the value of exact atomic mass

• Corrected atomic mass=Equivalent mas × valency

                                               =69.99 × 3 = 209.9 ≈ 209

Hence the value of valency is 3 and exact atomic mass is 209