15.90g of sodium chloride solution Wad made to react with 12.10g of lead trioxonitrate(v) to produce white percipiate of lead chloride solution and 8.40g of sodium troxonitrate(v). Determine the mass of,the white percipiate and show that the reaction can be used to verify the law of comservation of matter
To determine the mass of the white precipitate, we first need to write and balance the chemical equation for the reaction.
The reaction between sodium chloride (NaCl) and lead trioxonitrate(V) (Pb(NO3)3) can be represented by the following equation:
2NaCl + Pb(NO3)3 -> 2PbCl2 + 2NaNO3
From the balanced equation, we can see that for every 2 moles of NaCl, we get 2 moles of PbCl2.
Given that the molar mass of lead chloride (PbCl2) is 278.1 g/mol, we can proceed with the calculations.
1. Calculate the moles of NaCl used:
Moles of NaCl = mass / molar mass
Moles of NaCl = 15.90 g / 58.44 g/mol (the molar mass of NaCl)
Moles of NaCl = 0.272 mol
2. Use the mole ratio between NaCl and PbCl2 to determine the moles of PbCl2 formed:
Moles of PbCl2 = moles of NaCl * (2 moles of PbCl2 / 2 moles of NaCl)
Moles of PbCl2 = 0.272 mol
3. Calculate the mass of PbCl2 formed:
Mass of PbCl2 = moles of PbCl2 * molar mass
Mass of PbCl2 = 0.272 mol * 278.1 g/mol
Mass of PbCl2 = 75.46 g
Therefore, the mass of the white precipitate (lead chloride) formed in the reaction is 75.46 g.
To show that the reaction verifies the law of conservation of matter, we can compare the total mass of reactants (sodium chloride and lead trioxonitrate) to the total mass of products (lead chloride and sodium troxonitrate).
Total mass of reactants = mass of NaCl + mass of Pb(NO3)3
Total mass of reactants = 15.90 g + 12.10 g
Total mass of reactants = 28.00 g
Total mass of products = mass of PbCl2 + mass of NaNO3
Total mass of products = 75.46 g + 8.40 g
Total mass of products = 83.86 g
We can see that the total mass of reactants (28.00 g) is equal to the total mass of products (83.86 g), demonstrating that mass is conserved in the reaction. This verifies the law of conservation of matter.