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  1. ...+] is the concentration of hydrogen ion. For acid, no matter strong or weak , will have its [H+] decreased when water is added to...

    分類:科學及數學 > 化學 2010年03月06日

  2. strong acid donates H+, and weak acid doesn't refuse to donate H+, weak acid also donates H...some of its molecules are ionised, it called weak acid. eg of strong acid: HCl ---> H+ + Cl- (ionised...

    分類:科學及數學 > 化學 2007年05月12日

  3. ...aq) ions. H+(aq) + OH-(aq) → H2O(l) Case 2 : weak acid + strong alkali For example, consider the neutralization between ethanoic acid and...

    分類:科學及數學 > 化學 2007年05月25日

  4. ... in water to give H^+(aq) ions and OH^-(aq) respectively, while weak acids and weak alkalis are partially dissociated...

    分類:科學及數學 > 化學 2007年03月24日

  5. ...equivalence. one more drop of the strong acid will take over the roll of conjugate acid of the weak base. the range will fall at the acid range. so u want a pH indicator that will show colour...

    分類:科學及數學 > 化學 2008年04月24日

  6. ... always acidic instead. In addition, *A strong acid react with a weak alkali will form an acidic substance. *A strong acid react with a strong alkali will form neutral...

    分類:科學及數學 > 化學 2009年04月16日

  7. ... out (in amount) and so: For a ten-fold dilution of weak acid, the rise in pH value is less than 1 since the increase in amount of H+ ions will make the dilution effect to be less than tn-fold. Finally...

    分類:科學及數學 > 化學 2008年03月28日

  8. ... citric acid, which cause the sour taste of it. The citric acid is a weak acid and will ionize incompletely to form hydrogen ions and the anions of the acid in water...

    分類:科學及數學 > 化學 2007年05月05日

  9. metal + very dilute nitric acid → metal nitrate + hydrogen metal + dilute nitric acid → metal nitrate + nitrogen monoxide + water metal + concentrated nitric acid → metal nitrate + nitrogen dioxide + water metal + dilute hydrochloric acid → metal chloride + hydrogen metal + concentrated hydrochloric acid → metal chloride...

    分類:科學及數學 > 化學 2007年05月19日

  10. ...睇漏左d野 Commonly, we don't use waek acid and weak alkali to do titration, because there is no sharp change in... at the equivalence point. Most indicators will not give a sharp colour change at the equivalence, but they...

    分類:科學及數學 > 化學 2008年04月13日