how about anothet multiple choice question ?!we need the correct answere with out deatail
a) Identify the major ionic species present in an aqueous solution of Na2CO3. i. Na2,CO32 ii. Na2,C2,O3 iii. Na+,C4,O32. iv. Na,C,O2 v. Na+,CO2 b) What element is oxidized in the chemical reaction 3Cu+8HNO33Cu(NO3)2+2NO+4H2O? i. Cu ii. H iii. N iv. O v. H2O c) Which of these chemical equations describes an acid-base neutralization reac i. 2Al(s)+3H2SO4(aq)Al2(SO4)3(aq)+3H2(g) ii. SO2(g)+H2O(i)H2SO3(g) iii. LiOH(aq)+HNO3(aq)LiNO3(aq)+H2O(l) iv. 2KBr(aq)+Cl2(g)2KCl(aq)+Br2(l) v. CaBr2(aq)+H2SO4(aq)CaSO4(s)+2HBr(g) d) Which of the following is a weak Bropnst-Lowry acid? i. HClO4 ii. HNO3 iii. H2S iv. H2SO4 v. HCl e) A 0.9182g sample of CaBr2 is dissolved in enough water to give 500.mL of : What is the calcium ion concentration in this solution? i. 9.1910.3M ii. 2.30103M iii. 2.72103M iv. 4.59103M v. 1.25103M Treatment of a 0.2500g sample of impure KCl with an excess of AgNO in resultes. the formation of 0.2912g of AgCl, calculate the percentage or r i. 30.04%KCl 7i. 85.85%KCl . 65.85%KCl N. 60.599KCl v. 80.90%KCl 9) Suggest a suiable indicator for a titration based on the foliowing equation: HeSO3+2NaOHNaSO3+2H2O 1. Mattyene bue 1. Phecobhthaten ii. Cresolpuppo iv. Bromoctsol green v. Mehylene oranga h) Calculate the hydronium and hydroxide ion concentration of pure water at 25C. K.v1.0x10 "? KowL.i.in.iv.v.01041.0107M1.01021.01014M7.0101.7.0101M1.0104M5.0101M i) How many grams of lead are contained in 6.0102g of blood (the amount in an average adult) if the lead content is 0.62ppm ? i. 3.7102g ii. 0.72102g ii. 3.7102g i. 3.7106g v. 7.21029 i) Which choice gives the correct oxidation numbers for all three elements in Rb2SO3 in the order that the elements are shown in the formula? i. 2,+6,2 ii. 1,+4,3 iii. +2,+4,2 iv. +1,+4,2 v. +1,+6,6 Q 3-3: Choose the correct answer for the following. a) To prevent liquid-junction potential that limits the accuracy of potentiometry cell measurement, i. membrane electrode ii. Working electrode iii. Salt bridge of iv. Reference e b) The auxiliary electrode uses in voltammetry cell to i. Produce the potential due to transfer of charge to and from the analyte ii. Carry the current flowing through the cell iii. provides potential to the working electrode iv. Measure current under constant applied voltage c) Calculate the potential of a lanthanum (La+3) ion-selective electrode change if the electrode is removed from La(NO3)3 solution 1105M and placed in the solution 1.0102M of La(NO3)3 ? i. 0.0197V ii. 0.059V iii. 0.450V iv. 0.0295V Electrogravmetry analysis depends on equt in for emf Response of Lex i. Nicolsky Eisenman Equation ii. weighing the electrode before and after deposition of the metal solid on an electrode from the analyte solution. iii. measurement the quantity of electricity used to deposit the metal. iv. Nernst equation for measuring the weiaht A) Aepuirements of the reference electrode are Potential of refarence electrode should be known relative to the SHE. i. Potental of relerence electrode should be constant duting measurments iii. Potental of relerence electrode should be not senstive to the concentration of the analyte i. Answer a and b 0. Diflerence between voltammetry and polarographic cels is- 1. In the voltammetry, working electrode is lithium electrode ii. In the voltammetry, working electrode is enzyme electrode ii. The working electrode in the voltammetry is glass electrode with dropping mercury electrode. iv. In the polarography, dropping mercury electrode (DME) use as working electode g) Combination electrode means 1. Glass electrode and reference electrode in different body i. Incorporate three electrode glass electrode, AgAgCl and SCE as one electrode ii. Incorporate both glass and reference electrodes in one body . iv. Use two references electrodes h) Calculate the potential required to generate current of 3103A and with resistance equal 0.2a in the reversed direction of the cell potential equal 0.53V. I 0.52V ii. 0.39V ii. 0.52V in. 1,1V i) Before conducting voltammetric measurements, N2 gas is usually bubbied through solutions for a few minutes to remove dissolved .......... gas which is reduced at working electrode to form two oxygen waves i. O2 i. Af iii. CO2 iv. N2 j) A galvanic cell employs the folowing hall reactions Fe2ase+e=Is+2e=Fe2=31EE=0.771V=0.5355.V 1) What would be the cell reaction? i. 2Fe+3+3I=2Fe+2+lj (Cell reaction) -ii. 2Fe+2+3I=2Fe+3+I3 (Cell reaction) iii. Fe+3+T+3=Fe+2+2F35 (Cell reaction) iv. 2Fe+3+l3=Fe+2+2I3 (Cell reaction) 4) Pitering io Table 1, which of the following conpounds would you expect to have belR spectum in Figure 1? L. Heptane a. 1. Eutanol (i. 1.0 ctyne N. 2.Pentanone
