I need a good topic that wouldn't be too general or too common. Nobody should think of it so easily, it's better if its something like a audio-visual display, a visual display, a fixed model or a working model (no experiments), that a pair of thirteen-year-olds can handle by themselves. It would be nice even if its another simple topic, even under 'Organic Chemistry' or 'Medicinal Chemistry'.
2006-11-28 11:08:49 · 2 answers · asked by imi 1 in Science & Mathematics ➔ Chemistry
Test the common antacids (bases) to see which neutralize (turn to salt and water) best (if).
Acid the strength of stomach acid is easy to mix and safe.
Get an "A".
2006-11-28 13:24:25 · answer #1 · answered by teachr 5 · 0⤊ 0⤋
a million) Dissociation: HCOONa ? HCOO- + Na+ HCOO- is the conjugate base HCOOH is the acid 2) Kb = [OH-]²/ [HCOONa] 5.6*10^-eleven = [OH-]²/ 0.a million [OH-]² = ( 5.6*10^-eleven) *0.a million [OH-]² = 5.6*10^-12 [OH-] = ?( 5.6*10^-12) [OH-] = 2.37*10^-6 pOH = -log [OH-] pOH = -log (2.37*10^-6) pOH = 5.sixty 3 C) Equation: Ka *Kb = 10^-14 Ka = 10^-14 / ( 5.6*10^-eleven) Ka = a million.seventy 8*10^-4
2016-10-07 22:33:15 · answer #2 · answered by ? 4 · 0⤊ 0⤋