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Siba Asmar

Siba A.

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Questions asked

ANSWERED

Kratika Bhadauria verified

Numerade educator

A mixture of zinc, aluminum and copper, a total of 16 grams. treated with an excess of malic acid solution. 5.6 liters of gas was emitted (ASTP) and an insoluble precipitate weighing 5 grams remained. Determine the final percentages of all components of the initial mixture

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1. ?????? ?? ???, ????????? ?????? ????? ?????? 16 ??', ??????? ??????? ?? ?? ????? ??????? ????????.

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????? ?????: 13 ??? ?? ?????? ?-pH ?? ??????? ????? ????? ?????? ?????? ???? ??? (0.03 ?"?) ?? NaOH ?????? 0.4 ?-15 ?"? ?????. ?. ????? ???? ?????? ????? ????? ????? ???? ????? ?????? 1.024 M. \[ \text { . } ? a=1.8^{\prime} 10^{-5} \] ?. ????? ???? ?????? ????? ????? ????? ???? ????? ?????? K.008 M. \[ \text { . } K a=1.8^{\prime} 10^{-5} \] ?. ?????? ????? 0.4092 M ?????? ??? 0.21 M. ????? ????? \[ \mathrm{Ka}=1.8 \times 10^{-5} \]

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??? ?? ?????? ?-pH ?? ??????? ????? ????? ?????? ?????? ???? ??? 0.03 ???? \[ \text { . } ? a=1.8^{\prime} 10^{-5} \] ?. . ????? ???? ?????? ????? ????? ????? ???? ????? ?????? 10.008 M. \[ K a=1.8^{\prime} 10^{-5} \]

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[Pb2+] =[Ag+] = 0.10 M 诪讜住祝 诇讗讟 诇转诪讬住讛 注诐 KI(aq) PbI2,Ksp=7.1*10^-9 AgI ,Ksp=8.5*10^-17 诪讛 谞讚专砖 讻讚讬 砖讛拽讟讬讜谉 讛砖谞讬 讬转讞讬诇 诇砖拽讜注?

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ANSWERED

David Collins verified

Numerade educator

KI(aq) ???? ??? ?????? ?? [Pb2+] =[Ag+] = 0.10 M (?) ???? ???? ???? ??????? ????, ?? Agl? Pbl2

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\( [\mathrm{Pb} 2+]=[\mathrm{Ag}+]=0.10 \mathrm{M} \) ???? ??? ?????? ?? KI(aq) (?) ???? ????? ?? ?????? ???? ????? ???? ?????? ?????? ??? ?????? ???? (?) ??? ???? ?????? ??????? ?? Pb+2 I-Ag+ ?? ??? ?????? ?????? ?? ???????? ????? \[ \begin{array}{c} \mathrm{PbI}_{2}, K_{\mathrm{sp}}=7.1 \times 10^{-9} \\ K_{\mathrm{sp}}=8.5 \times 10^{-17} . \mathrm{Agl} \end{array} \]

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??? ?? ?????? ?-pH ?? ??????? ????? ????? ?????? ?????? ???? ??? (0.03 ?"?) ?? NaOH ?????? 0.4 ?-15 ?"? ?????. ?. ????? ???? ?????? ????? ????? ????? ???? ????? ?????? 1.024 M. Ka=1.8'10-5 ?. ????? ???? ?????? ????? ????? ????? ???? ????? ?????? 0.008 M. \[ \text { . } ? a=1.8^{\prime} 10^{-5} \] ????? ?????

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David Collins verified

Numerade educator

How many ml of concentrated acetic acid (35% acid (percent by mass), must be diluted with water to get 12.5 liters of a solution with PH = 3.25 data: Ka = 1.8*10^-5 Density- 1.044 g per ml

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??? ?"? ?? ????? ????? ?????? (35\% ????? (???? ????), ??????- 1.044 ??' \[ \text { ??"?, } \mathrm{Ka}=1.8 \times 10^{-5} \] ?? ????? ???? ??? ???? 12.5 ???? ??'?? ???? pH ?? 3.25?

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