Question

Hydrate of iron(iii) chloride thiocyanate was found to contain 19% h2o find the value of m

Answer 1

what's iron (iii)????

Answer 2

Answer:

The value of m is 3.

Explanation:

Molar mass of hydrate of iron thiocyanate be M

Percentage of water = 19%

Percentage of water in a hydrated compound:

$\%=\frac{x \text{molar mass of water}}{\text{Molar mass of compound}}\times 100$

x = number of water molecules

x = m

$19\%=\frac{m\times 18g/mol}{M}\times 100$

M= 94.736 m

M =56 g/mol +(3)32 g/mol + (3)14 g/mol+ (3)12 g/mol + m18 g/mol

=230 g/mol+m18 g/mol

m = 2.9 ≈ 3

The value of m is 3.