Drill calculate the ph of 0 10 m h 2 z in 0 50 m khz k a1 2 0 x 10 5 k a2 5 0 x 10 9
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Drill: Calculate the pH of 0.10 M H 2 Z in 0.50 M KHZ. K a1 = 2.0 x 10 -5 K a2 = 5.0 x 10 -9 - PowerPoint PPT Presentation


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Drill: Calculate the pH of 0.10 M H 2 Z in 0.50 M KHZ. K a1 = 2.0 x 10 -5 K a2 = 5.0 x 10 -9. Salt or Hydrolysis Reactions. Hydrolysis. Any reaction in which water is decomposed with all or part of its decomposition portions combining with the products. Hydrolysis.

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Drill calculate the ph of 0 10 m h 2 z in 0 50 m khz k a1 2 0 x 10 5 k a2 5 0 x 10 9
Drill: Calculate the pH of 0.10 M H2Z in 0.50 M KHZ.Ka1 = 2.0 x 10-5 Ka2 = 5.0 x 10-9


Salt or hydrolysis reactions
Salt orHydrolysis Reactions


Hydrolysis
Hydrolysis

Any reaction in which water is decomposed with all or part of its decomposition portions combining with the products


Hydrolysis

Water is added to decompose something


Hydrolysis

MX + HOH

HX + MOH



Salts1
Salts

  • Ionic compounds that dissolve ~ 100 % in water


Salts of Acids

  • Salts of acids are negative

  • (A-)


Salts of Bases

  • Salts of bases are Positive

  • (M+ or B+)


Salt Solutions

  • When salts dissolve, their ions can recombine with water


Salt solutions
Salt Solutions

  • The salts of weak acids can recombine with water producing basic solutions


Salt Solutions

  • The salts of weak bases can recombine with water producing acidic solutions


Salt Solutions

  • A- + H2O HA + OH-

  • B+ + H2O H+ + BOH


Drill: Calculate the salt/acid ratio of a solution of benzoic acid & sodium benzoate at a pH of 5.00.KaHBz = 6.4 x 10-5


Salt or Hydrolysis Problems benzoic acid & sodium benzoate at a pH of 5.00.


Salt Problem benzoic acid & sodium benzoate at a pH of 5.00.

  • Calculate the pH of a 0.20 M solution of NaBz

  • Ka HBz = 6.4 x 10-5


Drill: Calculate the pH of a solution of 0.10 M NH benzoic acid & sodium benzoate at a pH of 5.00.3 in 0.20 NH4Cl.Kb NH3 = 1.8 x 10-5


Salt or Hydrolysis Problems benzoic acid & sodium benzoate at a pH of 5.00.


Salt Problem benzoic acid & sodium benzoate at a pH of 5.00.

  • Calculate the pH of a 0.20 M solution of KNO2

  • Ka HNO2 = 7.1 x 10-4


Salt Problem benzoic acid & sodium benzoate at a pH of 5.00.

  • Calculate the pH of a 0.10 M solution of R-NH3Cl

  • Kb R-NH2 = 2.5 x 10-5



Drill: Calculate the salt to acid ratio required to make a buffer solution with a pH of 4.495 using benzoic acid.KaHBz = 6.4 x 10-5


Salt Applications buffer solution with a pH of 4.495 using benzoic acid.

  • Salts of strong acids & weak bases make acidic solutions


Salt Applications buffer solution with a pH of 4.495 using benzoic acid.

  • Salts of strong bases & weak acids make basic solutions


Salt Applications buffer solution with a pH of 4.495 using benzoic acid.

  • Salts of strong acids & strong bases make neutral solutions


Predict Relative pH buffer solution with a pH of 4.495 using benzoic acid.

  • NaAc MnCl2

  • KNO3 NH4Br

  • KHSO4 NH4Ac


Predict Relative pH buffer solution with a pH of 4.495 using benzoic acid.

  • KAc NaCl

  • KClO2 NH4Cl

  • K2SO4 NaI


Anhydrides buffer solution with a pH of 4.495 using benzoic acid.

  • Compounds without water; that when added to water, form other compounds


Acid Anhydrides buffer solution with a pH of 4.495 using benzoic acid.

  • Non-metal oxides that form acids when added to water


Basic Anhydrides buffer solution with a pH of 4.495 using benzoic acid.

  • Metal oxides that form bases when added to water


Predict Relative pH buffer solution with a pH of 4.495 using benzoic acid.

  • Na2O SO2

  • NO2 CO2

  • CaO Al2O3




Drill calculate the ph of a 0 72 m nh 4 no 3 solution k b nh3 1 8 x 10 5
Drill: Calculate the pH of a 0.72 M NH buffer solution with a pH of 4.495 using benzoic acid.4NO3 solution.KbNH3 = 1.8 x 10-5


Are there any questions on previous material? buffer solution with a pH of 4.495 using benzoic acid.


A b eq buffer salt hydrolysis problem
A/B eq, Buffer & Salt Hydrolysis Problem buffer solution with a pH of 4.495 using benzoic acid.


Calculate [H buffer solution with a pH of 4.495 using benzoic acid.3PO4], [H2PO4-1], [HPO4-2], [PO4-3], [K+], [H+], & pH of 1.0 M KH2PO4 in 0.50 M K2HPO4. Ka1 = 7.5 x 10-3Ka2 = 6.2 x 10-8Ka3 = 4.2 x 10-13


You need to make a buffer solution with its greatest buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.


11.2 g of KOH was added to 2.0 L of 0.075 M H buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.2CO3. Calculate the molarity of all ions present in the solution.Ka1 = 4.4 x 10-7Ka2 = 4.8 x 10-11


Drill: Calculate the pH of buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.

0.10 M HF. Ka HF = 6.5 x 10-4


Test review
Test Review buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.


Expect a straight acid base problem like the drill
Expect a straight acid/base problem like the drill buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.


Calculate the pH of 0.10 M HF in 0.20 M KF. buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.Ka HF = 6.5 x 10-4


Calculate the pH of 0.10 M KF. buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.Ka HF = 6.5 x 10-4


Predict Relative pH buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.

K2O MgO

ClO2 (NH4)2O

SO3 N2O3


Predict Relative pH buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.

  • KAc NaCl

  • KClO2 NH4Cl

  • K2SO4 NaI


Calculate the pH of 5.0 M KCN. buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.KaHCN= 5.0 x 10-10


Calculate pH of: buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.

0.20 M MOHin

0.50 M MCl

Kb = 5.0 x 10-5


Calculate pH of: buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.

0.20 M MCl

Kb = 5.0 x 10-5


Drill calculate the ph of 0 20 m kq k a hq 8 0 x 10 5
Drill: Calculate the pH of buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.0.20 M KQ. KaHQ = 8.0 x 10-5


Calculate pH of: buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.

  • 0.20 M HNO2

  • Ka = 2.0 x 10-4


Calculate pH of: buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.

  • 3.0 M HZin

  • 2.0 M KZ

  • Ka HZ = 3.0 x 10-5


Calculate pH of: buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.

  • 0.20 M KR

  • Ka HR = 2.0 x 10-5


Calculate pH of: buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.

  • 2.0 M HQ

  • Ka = 2.0 x 10-6


Calculate pH of: buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.

  • 0.60 M HZin

  • 0.90 M KZ

  • Ka HZ = 3.0 x 10-5


Calculate pH of: buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.

  • 0.20 M KQ

  • Ka HQ = 2.0 x 10-7


1.5 L of 0.25 M Ba(OH) buffering capacity at pH ~ 5.4. In general terms, describe what acid or base you would chose, & how you would make the buffer.2 was added to 1.0 L of 0.60 M H2SO3. Calculate [H2SO3], [HSO3-], [SO3-2], [H+], [OH-], & pH of the solution.Ka1 = 1.7 x 10-2Ka2 = 6.0 x 10-8




Strong Acids Salt Equilibria

Strong Bases


Acid rxns Salt Equilibria

Base rxns


A/B Equilibrium Constants Salt Equilibria

KW, KA, KB, & pH


Calculate ph of
Calculate pH of: Salt Equilibria

  • 0.025 M HNO3

  • 0.020 M KOH


150 mL of 0.10 M KOH was added to 100.0 mL of 0.10 M H Salt Equilibria2CO3. Calculate [H2CO3], [HCO3-], [CO3-2], [H+], [OH-], & pH of the solution.Ka1 = 4.4 x 10-7Ka2 = 4.7 x 10-11


Calculate [H Salt Equilibria3A], [H2A-1], [HA-2], [A-3], [K+], [H+],[OH-], & pH of 2.0 M KH2A. Ka1 = 4.0 x 10-3Ka2 = 5.0 x 10-8Ka3 = 2.5 x 10-13



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