Answer to Question #114007 in General Chemistry for Coast

Question

A metal X forms twvo
chlorides U and V. On analysis,
3.0g of U was found to contain
1.035 g of M and 12.51 g of V
was found to contain 6.615g of X.
a) Calculate the mass of chlorine
which combined with 1.00g X to
form U and V respectively
b) Deduce whether the law of
multiple proportions is obeyed.
c) Write the correct formula of U
and V.

Answer 1

a)

For substance U:

$$m(Cl) =1g*(3.0g - 1.035g)/1.035g = 1.899g$$

For substance V:

$$m(Cl) = 1g*(12.51g - 6.615g)/6.615g = 0.891g$$

b)

For substance U:

$$1 : 1.899 \approx 1 : 2$$

For substance V:

$$1 : 0.891 \approx 1:1$$