Hallar la concentración molar 6,5 g de NaCl disueltos en 300 ml de agua
Mm NaCl = 58.5 g/mol
1. calcular moles de soluto
n = masa/Mm
n = 6.5 g / 58.5 g/mol
n = 0.111 moles de soluto
2. calcular el volumen en Litros
V = 300 / 1000
V = 0.300 L
3. Calcular la Molaridad
M = n soluto / V(L) solc.
M = 0.111 mol / 0.300 L
M = 0.37 Molar
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Resolución por factor de conversión
M = 6.5 g x 1000 mL x 1 mol
⁻⁻⁻⁻⁻⁻⁻⁻⁻ ⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻ ⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻
300 mL 1 L 58.5 g
M = 0.37 molar
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Hallar la concentración molar 6,5 g de NaCl disueltos en 300 ml de agua
Mm NaCl = 58.5 g/mol
1. calcular moles de soluto
n = masa/Mm
n = 6.5 g / 58.5 g/mol
n = 0.111 moles de soluto
2. calcular el volumen en Litros
V = 300 / 1000
V = 0.300 L
3. Calcular la Molaridad
M = n soluto / V(L) solc.
M = 0.111 mol / 0.300 L
M = 0.37 Molar
``````````````````````````````````````````````````````````````````````````````````````````````````````
Resolución por factor de conversión
M = 6.5 g x 1000 mL x 1 mol
⁻⁻⁻⁻⁻⁻⁻⁻⁻ ⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻ ⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻
300 mL 1 L 58.5 g
M = 0.37 molar