A 1.80 g sample of barium chloride hydrate, BaCl2 ⋅ xH2O is treated with excess sulfuric acid, forming a BaSO4 precipitate which has a mass of 1.72 g. Calculate the value of x.

We have that for the Question , it can be said that the value of x is

x=2

From the question we are told

A 1.80 g sample of barium chloride hydrate, BaCl2 ⋅ xH2O is treated with excess sulfuric acid, forming a BaSO4 precipitate which has a mass of 1.72 g. Calculate the value of x.

Generally the equation for the moles of 1.72  is mathematically given as

Therefore

Hence mass H_2O

Therefore

The value of x will be

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The value of x is 2

Explanation:

BaCl2.xH2O react with H2SO4 according to the equation:

BaCl2.xH2O + H2SO4 —> BaSO4 + 2HCl + xH2O

Data obtained from the question include:

Mass of hydrated salt (BaCl2.xH2O) = 1.80g

Mass of BaSO4 = 1.72g

Now, let us calculate the number of mole of BaSO4 present in 1.72g of BaSO4. This is illustrated below:

Molar Mass of BaSO4 = 137 + 32 + (16x4) = 137 + 32 + 64 = 233g/mol

Mass of BaSO4 = 1.72g

Number of mole of BaSO4 =?

Number of mole = Mass /Molar Mass

Number of mole BaSO4 = 1.72/233

Number of mole BaSO4 = 0.0074 mole.

From the equation above,

1 mole of BaCl2.xH2O produced 1 mole of BaSO4.

Therefore, 0.0074 mole of BaCl2.xH2O will also produce 0.0074 mole of BaSO4.

Now, with this amount (i.e 0.0074 mole) of BaCl2.xH2O, we can obtain the value of x as follow:

Molar Mass of BaCl2.xH2O = 137 + (35.5x2) + x[(2x1) + 16]

= 137 + 71 + x[2 + 16]

= 208 + 18x

Mass of BaCl2.xH2O from the question = 1.80g

Number of mole of BaCl2.xH2O =

0.0074 mole

Number of mole = Mass /Molar Mass

0.0074 = 1.80/208 + 18x

Cross multiply to express in linear form as shown below:

0.0074(208 + 18x) = 1.8

Clear the bracket

1.5392 + 0.1332x = 1.8

Collect like terms

0.1332x = 1.8 - 1.5392

0.1332x = 0.2608

Divide both side by the coefficient of x i.e 0.1332

x = 0.2608/0.1332

x = 2

Therefore the formula for the hydrated salt (BaCl2.xH2O) is BaCl2.2H2O

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.