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IV.13. HYDROLYSIS (Hebden p. 144 – 148)
Hydrolysis of a Salt Rx between water and cation &/or anion in salt that produces an acidic or basic solution All salts are 100% ionized in water
Spectator Ions Do NOT react with waterThe conjugates of STRONG acids and bases
Spectator Cations Alkali metals Alkaline earth metalsEx: NaOH Na+ + OH-
Spectator Anions 1st top of Acid/ Base Table (not HSO4- b/c it is a weak acid) Ex: HCl H+ + Cl-
To determine the behavior of salt in water…Determine ions Discard spectators Remaining ions are acids if on acid side of table or bases if on base side of table
Ex #1: NaCl Na+ + Cl- Both Na+ and Cl- are spectatorsTherefore, solution is NEUTRAL
2. NH4Cl NH4+ + Cl- Cl- is a spectator Solution is acidicNH4+ + H2O = H3O+ + NH3
3. NaF Na+ + F- Na+ is a spectator Solution is basicF- + H20 = HF + OH-
4. NaHC2O4 Na++HC2O4- Na+ is a spectator Solution either acidic or basic b/c HC2O4- is amphiprotic We must determine which rx is predominant
Ka for HC2O4- = 6.4 x 10-5 Kb = Kw /Ka = 1.00 x / 5.9 x 10-2 = 1.7 x 10-13 Ka > Kb so solution is acidic HC2O4- + H20 = H3O+ +C2O42-
Must determine predominant rx5. NH4NO2 NH4+ + NO2- No spectators Must determine predominant rx
Ka of NH4+ = 5.6 x 10-10 Kb of NO2- = Kw/Ka = 1.0 x / 4.6 x 10-4 = 2.2 x 10-11 Solution is acidic NH4+ + H20 = H3O+ + NH3
Acids & Bases Hydrolysis Lesson 7. Hydrolysis Hydrolysis of a salt is… The reaction between water and the cation or anion ( or both) that make up the.
Acid/Base Properties of Salt Solutions Salts Ionic compounds When dissolved in water, salts may behave as acids, bases.
UNIT IV Ka and Kb.
HSC Chemistry – Acidic Environment R Slider. * The pH of a salt depends upon the relative strength of the ions that make up the salt * Very few salts.
A salt is an ionic compound consisting of a cation other than H+ and an anion other than OH minus. Here, we’ll show you all about hydrolysis of ions in.
Special Substances. IV. Strength of conjugates The stronger the acid or base is, the weaker its conjugate base. For example, HCl is a strong acid so its.
Go over Ch Test Summary of this week Questions over the reading Discussion / explanation Homework.
Salts as Acids and Bases Cations Sloshing Anions Sloshing Salt Ionic Compound Dissolves Ions Slosh Ions as Acids Ions as Bases Assuming that only one ion.
Salts and pH. Soluble salts dissociate in water to produce ions. Salts are basically ionic compounds that can be formed from the reaction from an acid.
Chemistry 1011 Slot 51 Chemistry 1011 TOPIC Acids and Bases TEXT REFERENCE Masterton and Hurley Chapter 4.2 (Review), 13, 14.1, 15.1 (page 427), 21.2 (page589)
Acid-Base Properties of Salt Solutions Salts That Form Neutral Solutions Salts that contain a cation from a strong base AND an anion from a strong acid.
PH of Salts When acids are neutralized by bases, water and a salt is formed. The salt solution can be acidic, basic, or neutral depending on the acid and.
Acid Strength and Structure Acid-Base Properties of Salts AP Chemistry.
Chapter 16 Sections 8-9. © 2009, Prentice-Hall, Inc. K a and K b K a and K b are related in this way: K a K b = K w Therefore, if you know one of them,
Hydrolysis and Neutralization. Predict whether an aqueous solution of a given ionic compound will be acidic, basic or neutral given the formula.
Salt Hydrolysis. Salts Ionic compound made up of CATION and ANION Has acidic and basic properties Based on ions produced when salts dissociate No acid/base.
Updates Assignment 04 is is due today (in class) Midterms marked (in the box); solutions are posted Assignment 03 is in the box.
Lecture 152/22/06 Topics due. Neutralization: Acid + Base = Water + Salt pH of neutralized solution? Strong Acid + Strong Base HCl (aq) + NaOH (aq)
IX.Salts and Hydrolysis Salts are simply ionic compounds. Salts can be formed by: 1.A metal reacting with a non-metal. 2 Na (s) + Cl 2(g) 2 NaCl.
(8.3) Acid-Base Properties of Salt Solutions. pH Review Recall Acidic [H 3 O + ] > [OH - ] Basic [H 3 O + ] < [OH - ] Neutral [H 3 O + ] = [OH - ]
You’ll find out what buffer solutions are and how they are prepared. Buffer Solutions Definition and Preparation.
Determining whether Salt Solutions are Acids or Bases.
Weak Acids A weak acid does not ionize completely to form hydrogen ions. e.g.HC 2 H 3 O 2 (aq ) H + (aq) + C 2 H 3 O 2 - (aq) 1.3% K a = [H + (aq) ] [H.
Equilibrium – Acids and Bases. Review of Acids and Bases Arrhenius Theory of Acids and Bases ▫An acid is a substance that dissociates in water to produce.
1 pH CURVES & INDICATORS How pH indicators work methyl orangephenolphthalein Choosing an appropriate indicator pH curves strong acid strong base strong.
Strong and Weak Acids and Bases
Chapter 15 Acids bases acids Sour Turns litmus red Reacts with some metals to produce H 2 Phenolphthalein-clear Corrosive Conducts electricity bases Bitter.
Determining the Strengths of Acids and Bases Objectives: 1. Define the term dissociation constant and explain what it indicates about and acid or a base.
Acid-Base Theories The “Boyz”. Acid and Base Theories2 Arrhenius Theory of Acids Acid: molecular substances that breaks-ups in aqueous solution into H+
PH of Weak Acids AP Chemistry Unit 9 Chapter 14. Strengths of Acids and Bases “Strength” refers to how much an acid or base ionizes in a solution. STRONGWEAK.
The Equilibrium of Weak Acids and Bases Weak Acids Molecules HF (aq) + H 2 O (l) ↔ H 3 O + (aq) + F - (aq) Cations NH 4 + (aq) + H 2 O (l) ↔ H 3 O +
Chapter 14 Arrhenius –Acid – create H + in water –Base – create OH - in water Bronsted-Lowery –Acid – donates proton (H + ) –Base – accepts proton (H +
Electrolytes Pre lab. Electrolytes: a quick review Electrolytes form ions in solution. Ions allow water to conduct electric current Three types of electrolytes:
Dissociation and Neutralization GLE What is dissociation? The process by which an ionic compound separates into its positive ions (cations) and.
And Neutralization. Acidic or basic is a chemical property Mixing them can cancel out their effects or neutralize them But 1st-water ionizes Water molecules.
Salts Def: Ionic compound whose cation comes from a base and whose anion comes from an acid Ex. 1 NaCl Ex. 2 K2CO3 Ex. 3 NH4Br.
Chapter 14 Section 2 Acid-Base Theories p Sections 1 -3 Properties of Acids & Bases Acid-Base Theories Acid-Base Reactions MODERN CHEMISTRY.
1 Acid-Base Properties of a Salt Solution One of the successes of the Brønsted- Lowry concept of acids and bases was in pointing out that some ions can.
Hydrolysis of Salts December What we know so far…. Bronsted-Lowry AcidsBronsted-Lowry Bases Donate H + (protons) Criteria to be an acid: Must have.
Acids Lesson 6 Classifying Everything. Neutral Acidic.
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Part 2 Chapter 17. Salt Solutions We will look at the cation and the anion separately, and then combine the result to determine whether the solution is.
Solubility and Ionic Equations
Buffers Resist change in pH when H + or OH - added Two most common types: –Weak acid and its conjugate base salt. (ex) HF / NaF –Weak base and its conjugate.
Chapter 1611 To quantify the relationship between strength of acid and conjugate base, recall multistep equilibria: Reaction 1 + reaction 2 = reaction.
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GenChem Ch /03/03TMHsiung 1/60 Chapter 16 Acids and Bases.
Acids and Bases. Arrhenius Theory Acids produce H + ions. Acids produce H + ions. Bases produce OH - ions. Bases produce OH - ions. HCl H + + Cl - NaOH.
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