Question

se disolvieron 48g de MgO en 600 ml de agua ¿cuál es su solución? ​

Answer 1

Respuesta:

% m/v = 7.40 % g/mL

M = 2 molar

Explicación:

se disolvieron 48 g de MgO en 600 ml de agua ¿cuál es su solución? ​

a. preparar el volumen de solución

v solc. = m soluto + v solvente

v solc. = 48 g + 600 mL

V solc. = 648 mL

b. calcular % m/v

% m/v = m soluto x  100

               v solc.

% m/v = _48 g _ x  100

             648 mL

% m/v = 7.40 % g/mL

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Calcular la molaridad

1. calcular el volumen en litros

v = 600 / 1000

V = 0.600 L

2. calcular moles de soluto

Mm MgO = 40 g/mol

n = masa/Mm

n = 48 g / 40 g/mol

n = 1.2 moles de soluto

3. calcular la molaridad

M = 1.2 moles

      0.600 L

M = 2 molar