Advertisements
Advertisements
Question
Calculate the percentage of phosphorus in calcium hydrogen phosphate Ca(H2PO4)2 .
Advertisements
Solution
Molar mass of Ca(H2PO4)2 is 2346/mole
Atomic mass of phosphorus is 31g
So percentage of phosphorus = `("atomic mass" xx 2)/("molar mass") xx 100`
= `(31 xx 2)/234 xx 100`
= `26.50%`
RELATED QUESTIONS
Calculate the percentage of phosphorus in calcium phosphate Ca3(PO4)2.
Find the empirical formula of the compounds with the following percentage composition:
Pb = 62.5%, N = 8.5%, O = 29.0%
1 g of a mixture of sodium chloride and sodium nitrate is dissolved in water. On adding silver nitrate solution, 1.435 g of AgCl is precipitated.
\[\ce{AgNO3_{( aq)} + NaCl_{( aq)}-> AgCl_{(s)} + NaNO3}\]
Calculate the precentage of NaCl in the mixture.
Find the percentage of boron in Na2B4O7.10H2O. [H = 1, B = 11, O = 16, Na = 23].
Find the percentage of phosphorus in the fertilizer superphosphate Ca(H2PO4)2.
Calculate the percentage of sodium in sodium aluminium fluoride (Na3AlF6) correct to the nearest whole number. (F = 19; Na = 23; Al = 27)
Calculate the percentage composition of calcium chloride.
60 g of a compound on analysis gave 24 g C, 4 g H and 32 g O. The empirical formula of the compound is ______.
Empirical formula of Ethyne.
Find the total percentage of Magnesium in magnesium nitrate crystals, Mg(NO3)2.6H2O.
[Mg = 24, N = 14, O = 16 and H = 1]
