Question #ed6fd
1 Answer
Explanation:
The problem tells you that your solution must have a molarity of
250 color(red)(cancel(color(black)("mL"))) * "1 L"/(10^3color(red)(cancel(color(black)("mL")))) = "0.250 L"
Now, a
This means that in order for your solution to have a molarity of
0.250 color(red)(cancel(color(black)("L solution"))) * "0.5 moles NaOH"/(1color(red)(cancel(color(black)("L solution")))) = "0.125 moles NaOH"
Finally, to convert the mass of sodium hydroxide to grams, use the compound's molar mass.
0.125 color(red)(cancel(color(black)("moles NaOH"))) * "40 g"/(1color(red)(cancel(color(black)("mole NaOH")))) = color(darkgreen)(ul(color(black)("5 g")))
The answer is rounded to one significant figure.