Question

how to find gram equivalent weight of sodium carbonate na2co3

Answer 1

$\huge\mathfrak\blue{Answer :}$

Equivalent Weight = Molar weight of the Compound ÷ Charge on the Compound.

Molar weight of Sodium Carbonate [CaCO3] = Atomic weight of Calcium + Atomic Weight of Carbon + Atomic Weight of Oxygen

= 40 + 12 + 16 × 3

40 + 12 + 48 = 100 g/mol

Charge on CaCO3 = Ca^2+ +CO32^-

Charge on CaCO3 = 2

So, Gram Equivalent Weight of CaCO3 = 100 ÷ 2 = 50.

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$\huge\mathcal\red{Hope\: it\: helps}$

Answer 2

Na2CO3 has a molar mass of 106g/mole  

The valence factor of a base is equal to its acidity. The acidity of a base is equal to how many hydroxyl ion (OH-) in its aqueous solution. With this background, we define equivalent weight of a base as :  

Equivalent weight,E= molecular weight base / acidity  

The numbers of electronic charge on cation of Na2CO3 is 2.  

in other words, Na2CO3 produces CO3[-2] (carbonate) anion that can react with two hydrogens so its equivalent weight is one half the formula weight. the equivalent weight of Na2CO3 is  

(46 + 12 + 48)/2 = 53g