Question

Por favor alguien que me ayude calcular la modalidad de una solución al mezclar 200g de H3 Po4 en 500 ml de agua

Answer 1

Mm H3PO4 = 98 g/mol

masa de agua = 500 mL / 1000 = 0.500 L

V = 0.500 L = 0.500 Kg de svte

mol = masa/Mm
mol = 200 g/98 g/mol
mol = 2.040

m = mol soluto / Kg svte
m = 2.040 mol / 0.50
m = 4.08 mol/Kg svte

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Molaridad = mol soluto / V(L)

M = 2.040 mol / 0.50 L
M = 4.08 mol/L