Question

Find the number of mg of NaCl per mL of 0.25 M solution.​

Answer 1

To find-no.of mg of Nacl/ml having molarity 0.25M

1M=58.44g/1L

so in 0.25M we have,

58.44g*0.25/1000ml=0.0146g

so a nacl solution with 0.25M has 0.0146g in 1000ml

so in 1ml we will have how many grams of Nacl??

=0.0146g/1000ml=0.00001461g=0.00001461*1000mg=0.01461mg

so 1ml of NaCl with 0.25M has 0.01461g.