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erfan

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Lepton

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  1. Erfan - don't get too disheartened. just remember that you don't need to understand 100% of chemistry to be good at it or to pass it or to enjoy it.

  2. ohhhh god,,ok just forget my question.. i hate chemistry and im not interested in learning it. and really u don't wanna help me,,U r just judging me.. tnx.bye
  3. If I was sure about my knowledges I would never ask about help..
  4. to analyse the ethanoic acid present in vinegar,i used potassium hydrogen phthalate to standardise the sodium hydroxide (my secondary standard ) why the primary standard in this practical is not suitable for standardising a solution of ammonia ?
  5. why secondary standard solution are used for standardisation ?
  6. to analyse the ethanoic acid present in vinegar,i used potassium hydrogen phthalate to standardise the sodium hydroxide (my secondary standard ) why the primary standard in this practical is not suitable for standardising a solution of ammonia ?
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