Chapter+4 - 1 Solutions Solutes Solvent Concentration...

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Unformatted text preview: 1 Solutions Solutes Solvent Concentration Dilute or concentrated Weight% Molarity, M #mol of solute per liter of solution (#g of solute/FW)/L of solution= M 2 Molarity Example How many grams of NaOH are required to make 100 mL 0f a 5.0 M solution? #g(X)= M x L x molar mass of X 5.0(mol/L)x0.100(L)x40(g/mol)=20g How many mL of 12M HCl are required to make 500 mL of 0.10 M HCl solution? M c x mL c = M d x mL d mL c =(.10 x 500)/12=4.2 3 Preparation of a Standard Solution 4 Electrolytes Solutes that exist as ions in solution Solutions of electrolytes conduct electricity Acids Bases Salts Strong Weak 5 Electrolytes and Nonelectrolytes 6 Strong and Weak Electrolytes 7 Examples of Electrolytes Acids Strong: HCl, HBr, HI, HNO 3 , H 2 SO 4 , HClO 3 , HClO 4 Weak: HOAc and all other acid Bases Strong: hydroxides of alkali and alkaline earths Weak: NH 3 and others 8 Examples continued Salts All soluble salts Alkali metal and ammonium salts Salts of the following anions: NO 3- OAc- Cl- except those of Ag(I), Hg(I), Pb(II) SO 4 2- except those of Ca, Sr, Ba, Hg(I), Pb(II) 9 Solubility Rules 10 Metathesis Reactions Precipitation AgNO 3 + KCl AgCl + KNO 3 BaCl 2 + H 2 SO 4 BaSO 4 + 2HCl Acid/Base Neutralization Ba(OH) 2 + HClO 4 Ba(ClO 4 ) 2 + 2H 2 O HOAc + NaOH NaOAc + H...
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This note was uploaded on 04/15/2008 for the course CHEM 1341 taught by Professor Compton during the Spring '08 term at Texas State.

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Chapter+4 - 1 Solutions Solutes Solvent Concentration...

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