That chemical with the funny name is properly called lead(II) nitrate.
Pb(NO3)2 + 2NaCl ==> PbCl2 + 2NaNO3.
mols PbCl2 needed = grams/molar mass = ?
You get 1 mol PbCl2 for every 1 mol Pb(NO3)2 used initially.
Then grams Pb(NO3)2 = mols Pb(NO3)2 x molar mass Pb(NO3)2 = ?
calculate the mass of lead || trioxonitrate(v) that will react with 7.8g of sodium chloride to form 10.5g of sodium trioxonitrate (v). if the law of conservation of mass is obeyed
2 answers
I like the answer by anonymous, especially about that funny name; however, anonymous didn't answer the question as the question asks. That is the questions asks to be answered using the law of conservation of mass. Note, however, that there isn't enough information given to answer the question using the law of conservation of mass. It would be done this way.
............Pb(NO3)2 + 2NaCl ==> PbCl2 + 2NaNO3.
................x grams.......7.8 g..........?............10.5 g.
g Pb(NO3)2 + g NaCl = g NaCl + g NaNO3 and solve for x.
BUT, since there is no mass given for PbCl2, the problem can't be answered this way.
............Pb(NO3)2 + 2NaCl ==> PbCl2 + 2NaNO3.
................x grams.......7.8 g..........?............10.5 g.
g Pb(NO3)2 + g NaCl = g NaCl + g NaNO3 and solve for x.
BUT, since there is no mass given for PbCl2, the problem can't be answered this way.