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How much sodium chloride be dissolved in water to make 1 litre of 0.1 F solution ?

Answer»


Solution :Gram formula MASS NaCI=23+35.5=58.5 G `("Formula mass")^(-1)`
VOLUME OS solution = L
Formality of solution = 0.1 F=0.1 (Formula mass)/LITRE
`"Formality (F)"=("Mass os NaCI/Gram formula mass")/("Volume of solution in litres")`
`"0.1 (Formula mass/litre)"=W/(58.5 "g (Formula mass)"^(-1)xx1L)`
`W=0.1 ("Formula mass/L")xx58.5 g("Formula mass")^(-1)xx1L`
` W=0.1xx58.8 g= 5.85 g`.


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