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  1. ... indicator shows the end point of the neutralization. At the end point, the acid and the alkali are just completely reacted without any one of them in excess.

    分類:科學及數學 > 化學 2014年08月17日

  2. 1a) 5P2 + 5P3 + 5P4 +5! = 320 1b) 3P2 + 3! + (2!)(3P2) + (3!)(3P2) = 60 2a) 10C4 = 210 2b) 210 ÷ 10 = 21 2c) 9C3 = 84 3a) (15C5)(3C1) + (10C5)(2C1) + 1 = 9514 3b) (12C4)(3C1)(3C1...

    分類:科學及數學 > 化學 2012年08月13日

  3. during titration, use (digital) pH meter to monitor the change of pH value. soda ash, or chemically, sodium carbonate, is a water softener. the hardness (calcium and magnesium ion) is removed by adding soda ash and precipitating the unwanted ions: Ca(2...

    分類:科學及數學 > 化學 2010年09月13日

  4. ... a small amount of alkali is added without shaken the conical flask, the alkali added would... is far less than that needed in end point, the added alkali neutralizes all the acid...

    分類:科學及數學 > 化學 2010年06月04日

  5. ... up the rate of chemical reaction but is chemical unchanged at the end of the reaction." A is an incomplete definition. In B, the phrase " without being used up" means some catalyst is consumed...

    分類:科學及數學 > 化學 2009年06月20日

  6. ... were lost . So the need for fire without a large initial flare was born. Inventors... the design of lighters when the war ended , they were able to be produced fast, ...

    分類:科學及數學 > 化學 2008年10月03日

  7. ...the horizontal plane. The other methyl group at the other end will be either above the plane or below the plane. Since...mirror image to each other. So, they are chiral. Without the help of graphics, it may be difficult to understand. ...

    分類:科學及數學 > 化學 2008年02月23日

  8. ... the positive charge of H+ there. Without the ions from the electrolyte, the charges...movement of the much more prevalent salt ions. ----- END ----- Hope the answers may help you. ...

    分類:科學及數學 > 化學 2008年01月23日

  9. ...and accepting electrons at the different ends of a conductor. In each half-cell is a chemical...necessary to provide electrical contact between the cells—but without the solutions mixing. This can simply...

    分類:科學及數學 > 化學 2007年04月18日

  10. =.=你都確定係1M HCL同時1M NAOH....係唔係都唔叫titration..... 但係有可能有少少情況conc.唔準...因為佢有可能吸左少少水.... 或HCL氣化走左..... 所以必須用titration確定濃度.......或者確定個Equivalence point 因為以上情況都適用於2種溶液(雖然...

    分類:科學及數學 > 化學 2007年03月07日