please, explain to me !! #2, 3, 4, 6, 9, 10, 11, 12, 13, 14, 17, 18! B7.2 % EN I
ID: 898753 • Letter: P
Question
please, explain to me !!
#2, 3, 4, 6, 9, 10, 11, 12, 13, 14, 17, 18!
B7.2 % EN IS , Aa2Ott ) O/Hasa, a H 50/" ke, tax D) 6.8 E) 7.0 Determine the pH of initial concentrations the following solution. are NH3-120 M, IKOH) -0320 M, K, (NHB) =1.8 1ors . ] A) 8.7 C) 117 D) 12.2 Par-3 night 10) of a buffer All of following will result in production the O Tr Amixing equal volumes of 0.10 MNaClgo (aq) and 0.10 M HClag the except B) mixing equal volumes of 0.10 M Naciology and 0.050 MHCMag. mixing equal volumes of 0.10 MHClton(q) and 0.050 M NaOHa mixing equal volumes of o10 M NaC2HBOzlag) and 0.10 MHCBOPA ). 11solubility ) The of magnesium fluoride water as in at 18 °C is tabulated 0.0076 g per 100 mL What is the solubility product for this salt? A) 8.0 x 10-8 B) 7.6 x 10-6 C) 3.8 , 10-10 9) – HP - n" - A LD . 11) D) 6.8 x 10-7 "3 x 10-9 12) An a 10-6. pH corresponding acid has KaelAt what would this acid and its salt make a good buffer? A) 7 B) 4 E) 8 12), 13) Does a precipitate 200 mlof Canon is mixed with of 0. form when 00002AM 100 ml 0012M13 ) NaFWhy? (Cat2, Ksp = 3.2x10-11), show calculation set-ups. A) Yes, (Qspec Ksp) fo, (QspExplanation / Answer
2. when 50 mL of 0.2 M C6H5COOH is titrated with 5 mL of 0.1 M NaOH, the titrating flask consists of C6H5COOH, C6H5COO- and Na+ as majaor species and this reactions is an example for neutralization reaction. At this point of titration, it consists of major amount of C6H5COOH, some amount of its neutralized species i.e. C6H5COO- and Na+. If the titration is carried out further, then there is a decrease in concentration of C6H5COOH as well as the increase in concentration of C6H5COO- and Na+ ions and the reactions continues till it consumes all of C6H5COOH (end poit).
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