Question

calcule el peso del soluto 20,0 ml de una solucion 0,14 M de Ca(OH)2

Answer 1

Mm Ca(OH)2 = 74 g/mol

1. convertir mL a L

      1 L ----- 1000 mL
         x -----  20.0 mL

       X = 0.02 L

2. Calcular moles de soluto despejando de la fórmula de M

M = moles soluto
      ````````````````````
             V(L)

moles soluto = 0.14 mol /L  x  0.02 L

moles soluto = 0.0028

3. calcular gramos de soluto

g = 0.0028 mol   x    74 g
                              ````````````
                                 1 mol

g = 0.207 g de Ca(OH)2