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AP Chemistry Chapter 4 Flashcards

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10635699831define solutionHomogeneous mixture of two or more substances0
10635699832solvent vs solutesolvent - greatest quantity solute - smaller quantity, gets dissolved1
10635699833When is a solution aqueousthe solvent is water2
10635699834Is pure water conductiveno3
10635699835define electrolyteA substance that creates *aqueous* solutions that contains ions. It dissociates into Ion in the solution4
10635699836define nonelectrolyteA substance that creates *aqueous* solutions that does not contain ions. I does not break up into ions5
10635699837which types of compounds create electrolytes/nonelectrolytesIonic compounds - electrolytes molecular compounds - nonelectrolyes6
10635699838define dissociatethe act of a compound breaking apart into ions during the act of dissolving7
10635699839Why is H2O good for dissolving (thus dissociating) ionic compoundsIt's partial charges H ions are partial positive O ion is partial negative8
10635699840define solvation/ solvated statesolvation is an interaction of a solute with the solvent, which leads to stabilization of the solute species in the solution. One may also refer to the solvated state, whereby an ion in a solution is surrounded or complexed by solvent molecules9
10635699841how to denote a solvated ionNa+(aq)10
10635699842What kinds of molecular compounds dissolved into ionsacids11
10635699843Define ionizeconvert (an atom, molecule, or substance) into an ion or ions, typically by removing one or more electrons12
10635699844Strong electrolytes vs weak electrolyetsstrong - exist almost completely as ions in aqueous solutions. All water soluble ionic compounds, few molecular compounds weak - exist mostly in the form of neutral molecules in aqueous solutions and only a small fraction dissociates into ions13
10635699845define solubilitythe amount to which a substance will dissolve at a given temperature14
10635699846strong electrolyte !=high solubility15
10635699847How to write the equation for an ionizing reaction (weak electrolytes)The two arrows mean the reaction is happening in both directions. As AH dissociates A+ and H+ recombine to become AH again. This achieves chemical equalibrium16
10635699848define chemical equalibriumnumber of each type of ion/molecule in a solution is constant17
10635699849How to determine if a compound is an ionic compoundThe presence of both metals and nonmetals except if an ion contains NH4+18
10635699850define precipitation reaction What happens during a precipitation reactionwhen a reaction in a liquid solution creates a solid charged ions attract each other so strongly the create an insoluble solid19
10635699851define precipitatethe solid formed by the precipitation reaction.20
10635699852solubility less than __________ is insoluble0.01 mol/L21
10635699853solubility rulesUnderstand then, don't need to memorize in BB22
10635699854are double displacement (metathesis) reactions redox reactions?Not a redox reaction23
10635699855How to balance an exchange reaction AKA double displacement reaction1. use the chemical formulas of the reactants to figure out which ions are present 2. write the chemical formulas of the products by combining the cation from one reaction with the anion of the other. Us the charges to determine the subscripts 3. check the solubilities. If one is insoluble it is a precipitation reaction 4. Balance the Equation24
10635699856molecular equationDoes not show ionic character25
10635699857complete ionic equation for double displacement reactionshows ionic character all soluble strong ions have their charges shown26
10635699858define spectator ions for double displacement reactionA spectator ion is an ion that exists in the same form on both the reactant and product sides of a chemical reaction. Thus it has no direct role in the reaction27
10635699859define net ionic equation for double displacement reactionthe equation consisting only of elements directly involved in the reaction to form: cross out anythin that doesn't change from left to right side What remains is your equation28
10635699860If every ion in an ionic equation is a spectator...No reaction happens29
10635699861What compounds are strong electrolytsall ionic compounds, strong acids30
10635699862What compounds are weak electrolytesweak acids, weak bases31
10635699863What compounds are nonelectrolytesanything that is not an ionic compound, weak acids, or weak bases32
10635699864Strong acidsHClO4 HClO3 H2SO4 HNO3 HCl HBr HI -ic acids are strong -ous acids are weak33
10635699865Strong basesLiOH NaOH KOH RbOH CsOH Ca(OH)2 Sr(OH)2 Ba(OH)2 Group A1 Group 2A34
10635699866Define acidsIonize in aqueous solutions to form H+(aq), hydrogen ions Hydrogen ions are essentially protons35
10635699867what are hydrogen ionsjust a proton (Hydrogen is just 1 proton and 1 electron)36
10635699868Monoprotic vs diproticmonoprotic - acid that yields 1 H+ ion diprotic - acid that yields 2 H+ ions37
10635699869define basesubstances that accept and react with H+ and produce OH- hydroxide ions when they dissolve A base does not have to have OH in it because it can often accept the O from the soultion38
10635699908How to find out if a substance is a strong electrolyte, weak electrolyte, or a nonelectrolyte39
10635699870Define neutralization actionwhen an acid and a base is mixed. The products do not have any of the characteristics of the reactants40
10635699871What do neutralization reactions between metal hydroxides and acids produce?salts and water You need to be able to recognize neutralization reactions. There may be questions that dont give a formula, but you can find it out yourself since you know the products of a neutralization reaction41
10635699872define saltany ionic compound whose cation comes from a base and it's anion comes from an acid42
10635699909green text43
10635699873Oxidation reduction reactionselectrons are transferred from one reactant to another44
10635699874Explain corrosion (redox reaction)The conversion of a metal to a metal compound by a reaction betweeen the metal and some substance in it's enviornment i.e. the metals ions loose an election, becoming cat ions, and combines with anions in the envirnment to form an ionic compound45
10635699875Define oxidizedwhen an atom, ion, or molecule has become more positive (looses electrons)46
10635699876Define oxidationthe losing of electrons47
10635699877define reducedwhen an atom,ion, or molecule has gained electrons48
10635699878define reductionthe gaining of electrons (becoming more negative`)49
10635699879Oxidation is always followed byreduction50
10635699880define oxidation number what is it needed to identifya number assigned to an element in chemical combination that represents the number of electrons lost (or gained, if the number is negative) by an atom of that element in the compound. Oxidation reduction reactions51
10635699881what is the oxidation number for monatomic ionsits the same as their charge52
10635699882what is the oxidation number for neutral molecules and polyatomic ionsa hypothetical charge determined by artificially dividing up the elections in the molecule/ion.53
10635699883What are the rules for determining oxidation number Google it, find out oxygen ad hydrogen exceptions What the ****1. In elemental for the oxidation number is 0 (one element in the formula, no over all charge) 2. for a monatomic ion the oxidation number is equal to the charge of the ion (Al3+ redox number is +3) 3. nonmetals usually have negative oxidation numbers but not always a. Oxygen is -2 except in peroxides b. Hydrogen is usually +1 when bonded to nonmetals and -1 when bonded to metals c. fluorine is always -1 . The other halogens are usually -1 in most binary compounds But when bonded with oxygen (oxyanions) they are positive. Certain elements have same oxidation number in all/most of their compounds a. 1A metals are always +1 in compound b. 2A metals are always +2 in compound cl Fluorine is always -1 in compound 4. The sum of oxidation numbers in a neutral compound is zero. The sum of the oxidation numbers in a polyatomic ion equals said ion's charge. 5. Max oxidation number of group A is its group number (roman numeral) 6. For nonmetals the minimum oxidation number is group number minus 8.54
10635699884define elemental formA substance that cannot be broken down into simpler substances by chemical means. An element is composed of atoms that have the same atomic number, that is, each atom has the same number of protons in its nucleus as all other atoms of that element.55
10635699885how to distinguish between charge and oxidation numbercharge = 2+ oxidation number = +256
10635699886the pattern of a reaction between a metal and an acid or metal saltA + BX ---> AX + B57
10635699887define displacement reactiona chemical reaction in which a more reactive element displaces a less reactive element from its compound. Both metals and non-metals take part in displacement reactions.58
10635699888define activity seriesa list of metals arranged by ease of oxidation59
10635699889define active metals, which are theymetals that are most easily oxidized the alkali metals and alkaline earth metals (maybe more)60
10635699890define noble metals, which are theytransition elements from groups 8B to 1B (maybe more) they have low reactivity61
10635699891what can the activity series predictthe outcome single displacement reactions (Maybe double displacement???)62
10635699892Which metals can be oxidized by which metalsEach metal on the activity series can be oxidized by metals lower than it on the table63
10635699893Anything under hydrogen on the activity series cannot...react with acids to form H264
10635699894define concentrationthe amount of solute dissolved in a quantity of solvent The more solute the more concentrated65
10635699895Define molarity molarity equation (aka how to find concentration)The concentration of a solution by how many moles of a solute is in it. (M) MOLES OVER L66
10635699896What does 1.0 M Ca(NO3)2 mean?1.0 mol of Ca(NO3)2 per liter 1.0 mol Ca(NO3)2/L67
10635699910Molarity problem68
10635699897Two ways to express concentration of electrolytesin terms of the compound used (1.0M of Na2SO4) In terms of the ions in the solution (2.0M Na+ and 1.0M of SO4^2-)69
10635699911convert moles to volume using molarity????70
10635699898define dilutionprocess of adding a concentrated version of a solution to another solution (usually water) gain a lower concentration of the concentrated solution. This is common for commonly used chemicals.71
10635699899Dilution problemIt's basically algebraic manuipulation72
10635699900Moles of solute before dilution =moles of solute after diultion73
10635699912Equation for dilution (can only be used for a pure solvent)74
10635699913Still need to do 4.6. Waiting to understand ch. 3 better75
10635699901What is special about the ferric ion in regards to Exchange (Metaphesis) reactionsFe3 stays Fe3 when moving from products to reactants76
10635699914Going from molecular formula to ionic formula to complete ionic formula77
10635699902Gas-forming reactionssome double displacement reactions don't give expected products When carbonate/bicarbonate....78
10635699903Oxidizing agent vs reducing agentoxidizing agent - substance that is reduced reducing agent- substance that is oxidized79
10635699904define single replacement (single displacement) reaction are they redox reactions?A + BC ---> AB + C are redox reactions80
10635699915How to identify if a reaction is a redox reaction81
10635699916Using molarity in stoichiometry flow chart82
10635699917Using molarity in stoichiometry problem83
10635699918Titration flow chart84
10635699919Single displacement reaction of halogens85
10635699920Reactants and products of combustion reactions86
10635699905what is H(OH)H2O87
10635699906Mass percent of solute (way of determining concentration other than molarity)mass of solute/mass of solution x 10088
10635699921Exceptions89
10635699907Carbonate charge Sulfate chargeCO3 2- SO4 2-90
10635699922Oxidation number rules91
10635699923How many liters of water must be added to dilute 250 mL of 12M HCl to 1M HCl92
10635699924yep93

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