Post a New Question

chemistry

posted by .

To make 10 mL of 25 mM sodium standard, what volume of 1 M NaCl stock should be used?
250 mL
2.5 mL
0.25 mL
0.5 mL
None of these
400 mL

  • chemistry -

    Hmmm. mM? is that milliMolar?

    If so, you are diluting it 1/.025 times, or 40 times, so you need 1 part stock, 39 parts water.

    1/40 th of 10 ml is 10ml/40= .25ml stock

    check my thinking

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

More Related Questions

Post a New Question