Definitions of Equivalent Weight ( Acid-Base Context ) The weight of a compound that contains ONE EQUIVALENT of a proton (for acid) or ONE EQUIVALENT of an hydroxide (for base).. Dear Abhishek. An equivalent weight of a solution is defined as the molecular weight of the solute divided by the valence of the solute. Molecular weight calculation: 1.00794*3 + 30.973761 + 15.9994*4. Similarly for HPO4(2-) -----> PO4(3-) + H(+), the equivalent weight is equal to the formula weight of K2HPO4 divided by 1. f***@hotmail.com 2005-02-02 03:14:12 UTC. This the equivalent weight is 98.0/2 = 49.0.
May 23,2020 - Equivalent weight of H3PO4 in each of the reaction will be respectively 1)H3PO4 OH- gives H2PO4- H2O 2)H3PO4 2OH-gives HPO7 raise to 2- + 2H2O? Since 3 protons are transferred in the reaction, we must divide the molar mass of the base by 3 to get the equivalent weight: Equivalent weight is used for predicting the mass of a substance that reacts with one atom of hydrogen in an acid-base analysis like in titration. | EduRev NEET Question is disucussed on EduRev Study Group by 562 NEET Students. Equivalent weight stands for Molecular weight/N factorN factor means H+ or OH- exchange in case of acid and bases respectively and in case of salts it is charge on cationnow , in given Question mass of H3PO4 is 98 and N factor is 2 as 2H are donatedso equivalent weight is 98/2= 49 The equivalent weight of phosphoric acid (H3PO4) in the reaction : NaOH + H3PO4 → NaH2PO4+ H2O is (a) 25 (b) 49 (c) 59 (d) 98. Note that this acid can donate two protons, as the sulfate ion is left with a charge of −2. Answer this question and win exciting prizes Now EQUIVALENT WEIGHT = 98/3 gram/equivalent = 32.67 gram/equivalents. 2 Expert Answer(s) - 221890 - The equivalent weight of H3PO4 and Na2HPO4 in the following reaction are respectively .
is just plain WRONG.. Regards. Equivalent weight is the (mass of) number of moles of one reactant in a balanced reaction (or product) divided by the number of moles of another..
Login to reply the answers Post .0485 L X 0.0435 M H3PO4 = 0.00211 moles of H3PO4. The molecular weight of phosphoric acid is; (3+31+16*4)gram/mol = 98 gram/mol. for H2PO4(-) -----> PO4(3-) + 2H(+), the equivalent weight is equal to the formula weight of KH2PO4 divided by 2. This compound is also known as Orthophosphoric Acid or Phosphoric Acid. In the simple case where we have two reactants which combine 1:1, then the mass of 1 mole of either is its equivalent weight. Convert grams H3PO4 to moles or moles H3PO4 to grams. Login. The equivalent weight of an element or radical is equal to the ratio of it's atomic weight or formula weight devided by it's valency. Phosphoric acid solutions up to a concn equivalent of about 94% H3PO4 (68% P2O5) contain H3PO4 as the only phosphoric acid species present.
24598 Points. At higher concentrations, the orthophosphoric acid undergoes condensation (polymerization by dehydration) to yield a mixture of phosphoric acid species, often referred to generically as polyphosphoric acid or superphosphoric acid, H2O/P2O5 = ca. Answers : (2) Arun. The charge of PO4 (3-) is 3. At the equivalence point, moles of acid =moles of base, so 0.915 g of base = 0.00211 moles of base. Examples: (1) H 2 SO 4 + 2OH-= 2H 2 O + SO 4 2- Molecular weight of sulfuric acid (H 2 SO 4) = 98.07 g/mol. Y.S. Arun (askIITians forum expert) one year ago. Equivalent weight of an acid salt depends on the reaction i.e the number of ionizable protons. Molar mass of H3PO4 = 97.995181 g/mol. Permalink. The given reaction is: Ca(OH) 2 + H 3 PO 4 → CaHPO 4 + 2H 2 O. g eq−1kg eq−1. Therefore equivalent weight of H3PO4 is molecular weight/3 = 98/3 = 32.67. 0 0 0. In the reaction, the molar mass of the base is: 0.915 g/ 0.00211 moles = 434 g/mol. = 98/1. Theoretical Equivalent weight of sulfuric acid (H 2 SO 4) = 49.03 g/equivalent of H + In the reaction NaOH + H3PO4→ NaH2PO4 + H2O Number of hydrogen ions replaced by the base of the acid is 2 .Molar mass of the acid = 98 gm per mol Equivalent weight = 982 = 49
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