chem105 exam2- week 8

chem105 exam2- week 8 - from the ionization reaction: HF +...

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Chem 105 Exam 2 Week 8
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If a solution of salt and water were found to have salt crystals on the bottom even after long stirring, the solution would be unsaturated monosaturated saturated supersaturated Quick question to test your understanding of saturation!
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Acids and Bases Acids yield H30+ Donates ‘protons’ or H+ ions Bases yield OH- Accepts ‘protons’ Note: monoprotic vs polyprotic
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Things to memorize --strong and weak acids and bases Table 4.2 in BLB p 130—strong acids Assume everything else is weak Weak acids: hydrofluoric, carbonic, acetic, phosphoric Weak bases: ammonia
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Neutralization Reactions Adding acid to base A neutralization reaction always produces a) an acid b) a base c) water d) a strong electrolyte
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Amphoteric Substances Amphoteric substances can act as BOTH an acid and a base Water (H2O) and bicarbonate ion (HCO3-)
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Conjugate Acids/Bases
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Unformatted text preview: from the ionization reaction: HF + H2O = H3O+ + F- F- is the conjugate base of HF (look at the reaction backwards) How is it acting as a base? Lets try one! NH3 + H2O = NH4+ + OH- Naming Acids series of halogen acidsCl, Br, I (e.g., perbromic, bromic, bromous, hypobromous) sulfurous, nitrous (weak) Calculating pH -log[H+] = pH pH + pOH = 14 The pH of a solution of acetic acid is 4.37. What is the [OH-]? a) 4.37 x 10-10 M b) 2.34 x 10-10 M c) 10-4.37 M d) 104.37 M How many grams of Ns2SO4 are needed to make .350L of .5 M solution? When 3.65g HCL are dissolved in water to produce 500 mL of solution, what is the resulting ph? When .98 g of sulfuric acid are dissolved in water to produce 1000 mL of solution, in what range will be the resulting pH? Questions??...
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This note was uploaded on 11/04/2011 for the course CHEM 105 taught by Professor Macedone during the Fall '07 term at BYU.

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chem105 exam2- week 8 - from the ionization reaction: HF +...

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