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Posted by on Tuesday, October 16, 2012 at 5:31am.

We had a lab where the standard solution was potassium hdrogenphthalate. In this we added 3 drops of phenolphtalein indicator and then we ran sodium hydroxide into the solution. We did four different flasks and the final readings for these then were 26.00 cm3, 32.00 cm3, 26.10 cm3 and 29.90 cm3. So, my question is how do I calculate the concentration of the hydrogenphthalate solution and the concentration of the sodium solution.
Thanks on beforehand

  • Chemistry - , Tuesday, October 16, 2012 at 6:10am

    Just saw that I forgat to notice that the amount of potassium hydrogenphtalate was 5.12 grams. Also, it was enough with two readings within ± 0,01 cm3

  • Chemistry - , Tuesday, October 16, 2012 at 8:24pm

    mols KHP = grams/molar mass
    mols NaOH = mols KHP
    M NaOH = mols NaOH/L NaOH

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