Question

Question : A chloride of an element contains 49.5%
chlorine. The specific heat of the element is 0.056. Calculate the equivalent mass, valency and atomic mass of the element.​

Answer 1

Mass of chlorine in the metal chloride =49.5%

Mass of metal =(100-49.5)=50.5

Equivalent mass of the metal =massofmetalmassofchlorine×35.5

=50.549.5×35.5

=36.21

According to Dulong and Petit's law

Atomic mass of the metal =6.4specificheat

=6.40.056×114.3

∴ valency =Approx.atomicmassEquivalentmass

=114.336.21

=3.1

=3(approx)

Answer 2

$\huge \red{Hello \: Dear.}$


$\bf{Here \: is \: the \: answer---}$



Mass of the Chlorine in the Chloride = 49.5 %
∴ Mass of the Metal = (100 - 49.5)%
   = 50.5%

∵ Equivalent Mass = 
$\frac{mass \: of \: metal}{mass \: of \: chlorine} \times 35.5$
 
= (50.5/49.5) × 35.5
= 36.21 

$\bf{∴ \: Equivalent \: mass \: is \: 36.21}$


For the Valency,
 
∵ Atomic Mass of the Element × Specific Heat = 6.4
∴ Atomic mass of the Element = 6.4/0.056
= 114.28

∵ Valency = Atomic Mass/Equivalent Mass
   = 114.28/36.21
   = 3.16
   ≈ 3

$\bf{∴ \: Valency \: of \: the \: Element \: is \: 3.}$


$\huge \pink{Hope \: it \: helps...}$