Question

★ Hello Brainly users ★

On dissolving 6 gm of metal in Sulphuric acid, 13.53 g of the metal sulphate was formed. The specific heat of metal is 0.057 cal/g What is equivalent mass of metal, valency and exact atomic mass?

NEED QUALITY ANSWERS

No spamming​

Answer 1

Answer:

Explanation:

Solution :-

Let us assume the chemical reaction as :-

$Metal+H_2SO_4\rightarrow M_2(SO_4)_x+H_2$

1) Equivalence mass of Metal = $\sf\dfrac{Mass\:of\:Metal}{Mass\:of\:sulphate}\times equivalent\:mass\:of\:sulphate$

Equivalence mass = $\sf\dfrac{Molar\:mass}{Replacable\:hydrogen\:ions(basicity)}$

Molar mass of $SO_4$ = 32+4(16)

= 32+64

= 96g

Number of replacable Hydrogen Ions = 2.

Equivalence mass of  sulphate = $\dfrac{96g}{2}$ = 48g

Given , Mass of Metal = 6gm

Mass of Sulphate = Mass metal sulphate - Mass of metal in sulphuric Acid

= 13.53g - 6g

= 7.53g

Equivalent mass of metal = $\sf\dfrac{6}{7.53}\times 48$  = 0.796$\times$48

= 38.24 g

2) Valency :-

Valency = $\sf\dfrac{Approx\:atomic\:mass}{equivalent\:mass}$

Approx atomic mass = $\sf\dfrac{6.4}{Specific\:heat}$

Given specific heat = 0.057 cal/g

Approx atomic mass = $\sf\dfrac{6.4}{0.057}$

= 112.28g

Valency = $\sf\dfrac{112.28}{38.24}$

= 2.9

≈ 3

Valency = 3

3) Exact atomic mass :-

Exact atomic mass = valency$\sf\times$Equivalent Mass

= $3\times 38.24$

= 114.72g.

Answer 2

Answer:

QuestioN :

On dissolving 6 gm of metal in Sulphuric acid, 13.53 g of the metal sulphate was formed. The specific heat of metal is 0.057 cal/g What is equivalent mass of metal, valency and exact atomic mass?

GiveN :

• Dissolving 6 gm of metal in Sulphuric acid, 13.53 g of the metal sulphate was formed.

• The specific heat of metal is 0.057 cal/g

To FiNd :

• The equivalent mass of metal, valency and exact atomic mass?

ANswer :

The equivalent mass of metal, valency and exact atomic mass is 114.72.

SolutioN :

$\sf Equivalent\: mass\:of\:sulphate= \dfrac{\:ionic\:mass}{Valency}$

$\sf=\dfrac{96}{2}=48$

$\sf Eq.weight\:of\:metal=\dfrac{Mass\:of\:Metal}{Mass \:of \:Sulphate} \times \:48$

$\sf= \dfrac{6}{13.53-6}\times48$

$\sf=\dfrac{6}{7.53}\times48$

$\sf = 38.24g$

$\sf Approximate\:atomic\:mass=\dfrac{6.4}{Specific\:\:Heat}$

$\sf=\dfrac{6.4}{0.057}=112.3$

$\sf Valency=\dfrac{Approximate\:Atomic\:Mass}{Equivalent\:Mass}$

$\sf = \dfrac{112.3}{38.24}=2.9=3$

$\sf \implies Exact \:atomic\: mass = 3 \times 38.24 = 114.72$

∴ Hence, The equivalent mass of metal, valency and exact atomic mass is 114.72.

_________________________

Note: If you are not able to see the answer properly then Kindly view the answer from website by the given link ↓↓↓

brainly.in/question/39215869