10th grade chemistry

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We're doing a lab report on the hardness of water, and one of the calculations is
"The EDTA reacts with the hard water ions in a 1:1 mole ratio. Calculate the molarity of the ions present in 20 mL of water tested."
How would you do this?

  • 10th grade chemistry -

    volume and mass

  • 10th grade chemistry -

    A weather ballon with a 2 meter diameter at ambient temperature holds 525 grams of helium. What type of electronic probe could be used to determine the pressure inside the balloon?

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