how to calculate maximum mass of an ahydrous solution????/

how to calculate max mass

An anhydrous solution?

"Anhydrous" means no water is present.
"Solution" means it is dissolved in water.

There is a problem here :P

Reply 2

we knnow

Original post by lizardlizard

An anhydrous solution?

"Anhydrous" means no water is present.
"Solution" means it is dissolved in water.

There is a problem here :P

sorry this is the question

Lead(II) nitrate may be produced by the reaction between nitric acid and lead(II) oxide as shown by the equation below.

PbO + 2HNO3 ® Pb(NO3)2 + H2O

An excess of lead(II) oxide was allowed to react with 175 cm3 of 1.50 mol dm–3 nitric acid. Calculate the maximum mass of lead(II) nitrate which could be obtained from this reaction.

Reply 3

lizardlizard

First, you need to work out the amount of HNO₃, using n=cv. Make sure to convert the cm³ into dm³ first (to get from cm³ to dm³, divide by 1000).

Once you know this, look at the molar ratio in the reaction (how much of the chemical is on either side). For every 2mol of HNO₃, you produce 1mol of Pb(NO₃)₂. This means that the amont of lead(II) nitrate will be half the amount of nitric acid.

You'll also need the molar mass (M_r) of lead(II) nitrate. Work this out from the periodic table (you should know how to do this).

You can then work out the mass using m = n x M_r. This is called the maximum mass because the mass produced will probably be less than this in an experiment, for example because not all of the reactants would fully react.