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Acid-Base reactions. CH 3 CO 2 H(aq) + NaOH(aq) 1. CH 3 CO 2 H 2 + (aq) + NaO(aq) 2. CH 3 CO 2 - (aq) + H 2 O(l) + Na + (aq) 3. CH 4 (g) + CO 2 (g) + H2O(l). Acid-Base reactions. HCN(aq) + NH 3 (aq) 1. NH 4 + (aq) + CN - (aq) - PowerPoint PPT Presentation
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Acid-Base reactions
CH3CO2H(aq) + NaOH(aq)
1. CH3CO2H2+(aq) + NaO(aq)
2. CH3CO2-(aq) + H2O(l) + Na+(aq)
3. CH4(g) + CO2(g) + H2O(l)
Acid-Base reactions
HCN(aq) + NH3(aq)
1. NH4+(aq) + CN-(aq)
2. H2CN+(aq) + NH2-(aq)
3. C2N2(s) + 3 H2(g)
Acid-Base Reactions:Find the hidden bases
Thing to know: Anions of weak acids are bases.
Example: CH3COOH = weak acid
CH3COO- therefore = weak base
HCN = weak acid CN- = weak base
H3PO4 = weak acid
PO43- = weak base
Return to Acid-Base Reactions:Find the hidden bases
HCl + NaCN ?
HCl + AlPO4 ?
HCl + CaC2O4 ?
Precipitation Reactions
Solubility of Ionic Compounds
dissolving
To Determine Solubility: 1. identify the two ions 2. soluble ions with no “exceptions” never form precipitates 3. use listing under soluble/insoluble, but check to see if it’s an exception
Examples
Soluble or Insoluble?
1. NaNO3
2. FeCl33. Fe(OH)3
4. BaSO4
5. AgNO3
6. AgCl
More Examples
Soluble or Insoluble?
1. K3PO4
2. Fe3(PO4)2
3. PbCl24. FeSO4
5. (NH4)2S6. PbS
PRS Example 1
Which of the following is soluble?
1. AlPO4
2. PbBr2
3. Al(OH)3
4. FeSO4
PRS Example 2
Which of the following is insoluble?
1. Al(NO3)3
2. PbC2O4
3. NaOH
4. FeF3
Precipitation ReactionsNet Ionic Equations
Pb(NO3)2 + K2CrO4 ?
Pb(NO3)2 + KI ?
BaCl2 + KNO3
Gas Forming Reactions
2 H+ + CO32- CO2(g) + H2O(l)
2 H+ + SO32- SO2(g) + H2O(l)
2 H+ + M H2(g) + M2+(aq)
M = metal, like Mg or Fe