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  1. 一開始落左25cm³ 0.1mol dm⁻³ 既 potassium dichromate (in excess) initial no. of moles = (25/1000)(0.1) (25cm³要轉返做dm³) = 2.5*10⁻³ mol 後來用左27.8cm³ 0.1 moldm⁻³ ammonium iron(II) sulphate 同excess potassium dichromate react...

    分類:科學及數學 > 化學 2013年02月27日

  2. ...gas particles by each other due to intermolecular forces. Go back and check out the properties and assumptions of ideal gas!!

    分類:科學及數學 > 化學 2010年09月18日

  3. http://tonny.earthppl.com/att/Chemistry%20Report%202.doc this lab report may help u it is the same experiment that u have done

    分類:科學及數學 > 化學 2007年10月15日

  4. ... carbon dioxide. when we shake a can of soft drink, the carbon dioxide comes out from the liquid. at the same time, carbon dioxide goes back into the liquid again. if you have to drink the shaked soft drink immediatly. 2008-01-04...

    分類:科學及數學 > 化學 2008年01月06日

  5. ... cyclinder would not affect the volume. 4.when there is striking back ,we should a.complete the experiment immediately b.blow out the flame c.close the air hole d.turn off the gas tap The answer is...

    分類:科學及數學 > 化學 2007年11月11日

  6. ...solubility is not very high. The gas is readily coming out from the liquid. During the shaking, it suddenly provides a...

    分類:科學及數學 > 化學 2008年01月16日

  7. Q1: It is because there is mainly air inside. Q2: The delivery tube should be removed to prevent sucking back which will crack the reaction tube.

    分類:科學及數學 > 化學 2008年12月31日

  8. When electrons came out of the negative side (of the battery) and went into an electrical applicance like motor, then the electrons went back to the positive side (of the battery). What have changed is the...

    分類:科學及數學 > 化學 2007年10月12日

  9. 1) A back titration is used when direct titration cannot be ..., the titrations have to be carried out immediately after addition of sulphuric acid. 3) Iodine and...

    分類:科學及數學 > 化學 2009年09月30日

  10. Consider the titration of Na2S2O3against the I2 formed: I2 + 2Na2S2O3 → 2NaI + Na2S4O6 No. of moles of Na2S2O3 used = 0.05 x(15/1000) = 0.00075 mol No. of moles of I2...

    分類:科學及數學 > 化學 2013年06月07日