In the standardi zation of HCl using pure anhydrou s sodium carbonate as primary standard for methy l orange as indica tor , 1.0 mL HCl was found to be equiva lent to 0.05g of sodium carbonate (MW =106). The no rmality of HCl is
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In the standardi zation of HCl using pure anhydrou s sodium carbonate as primary
standard for methy l orange as indica tor , 1.0 mL HCl was found to be equiva lent to 0.05g
of sodium carbonate (MW =106). The no rmality of HCl is
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- UEid- base tit ration the Consentrat ion of ammonia Solution excess HCL was titrated ith o.07om Na, cO3 Solutian. The volume of Na, Coz Solution reguired was 15.50 ml using the following eguations: 2HCLem> + Na, COgcaps CO2 Cays + HzO1) t NaCL Calculate the concentration (molarity and ppm) of ammonia in the Original Solution.(MM of NHzis 17.031.9/4) 10.0 was by of o.10OMI HCE to Then0-25 Nor 1lit of Hcl mixed Ceith OINO somlor Hel, then find Normalibs q folition is A) 0. 16 B) 0.24 C) 0. 32 )) 0.48Q1) A sada- Lime Sample is 90% NaoH and 10% CaO• If 3gm is dissolved in 250 ml, what is the tutal normadity of the Selution as abase ? How many milliliters of O.57N H2 S@4 would be requiredd to titrate i00 me of the Solution ? Ans.s ( 0.309 N, 60.59 ml) Q12) How much water that required add to 200 ml HNO, ( densly = 1.285 gm/ml) Contains 46 wt% acid to Convert lo wt% acid solution? Ars. : 919.6 ml
- EXAMPLE QUESTONS For APP. OF Aa Eaul, CHEM IB SI 1. a USE ICE TABLE METHOD To DETERMINE THE RELATONSHIP AN BETWEEN THE Kse VALUE AND THE MOLAR SOLUBILITY OF THE FOLLOWING- SALT : Ksp = ? x 3 b. DETERMINE SaLUBILITY OF Cr(OH), IF THE Ksp THE MOLAR - 3 ミ 1.3 x 10 WAS WRITE IF THE SOLID ( Pb SOu ) A Naz Soy SOLUTION, 2. a GWEN THE EAUATION BELOW, SHOW AND WLし BE MORE OR LESS SOLUBLE IN 2- Pb Sou (s) = Pb b. Dok S THIS MEAN THAT Pb SOy 's Naz Soy SOLUION? MOLAR SOLUBILITY WILL BE HIGHHER IN(a) Calculate the percent lonization of 0.00820 M hydrosulfuric acid (K,- 9.5e-08). % lonization - % (b) Calculate the percent lanization of 0.00820 M hydrosulfuric acid in a solution containing 0.0810 M sodium hydrogen sulfate. % lonization = %Calculate the percentage CH3COOH in a sample of vinegar from the following data.Sample = 15.00 g, NaOH used = 43.00 ml ; 0.600 N H2SO4 used for back titration =0.250 ml ; 1.00ml NaOH is equivalent to 0.0315 g H2C2O4. 2H2O.
- - 4 Hom: X 00 4.6 Applied Opt x 0o DESU Calculus X https://app.101edu.co Aktiv Chemistry X + G Consider the re: X G Consider the re: X Consider the reaction of 60.5 mL of 0.310 M NaC7HsO2 with 50.0 mL of 0.245 M HBr. (Ka of HC7HsO2 = 6.3 x 10-5) Question 9.g of 21 With 0.0065 moles of C7HsO2 and 0.0123 moles of HC7H5O₂ in the beaker, what would be the pH of this solution after the reaction goes to completion? Q Search 21 a (368) Optimizati X A to 4 www.desu.edu X G - 1 7 Su Delaware State x+ 4 5 +/- 2 3 8 6 9 0 Submit X C 4x x 100 O 0 8:31 PM 3/26/202310. A 0.514 gram sample of NazCO, (106.0 g/mol) was dissolved in distilled water in a 100.0 mi volumetric flask. The molar concentration of Na,CO, in solution is: 0.0485 M 0.0370 M b. 0.4849 M 0.0340 M 0.0330 M d. е.La) Provide the balance cauation for this veaction Consider th hydrasne Na He NHs Caq)NA ockag)+ H2 OpN2H rcacko to produce 4- st Na Cl(an) b)if, 136.0.me of 0.375 M amming solution reacts With188L Na OCL at STP Which the immiting reagent and Which is the excess regont. is c)if 250ML hudrazine gas is collected at STP, wheet is eaction. the percend yield of the
- A 3.00 mL aliquot of 0.001 M NaSCN is diluted to 25.0 mL with 0.1 M HNO3. How many moles of SCN- are present?6) Bu analyst in a solution uning two dierent indicators. lis results were an /lowes : meanired the con cen tration n aid Mean [HCI]+ Stand Dev. 002467テ 0.0045 Indi cator A: 18 12 Indicator B: 0-02407 チ0.0032 Is the difference between te tueo indican Ys figniticand at he 95%. confiden ce loue/?3.A sample is known to contain NaOH, Na2CO3 NaHCO3 or compatible mixture of these together with inert matter. With methyl orange, a 1.100 g sample requires 31.40 mL of HCl ( 1.00 mL is equivalent to 0.0140g CaO). With phenolphthalein indicator, the same weight of sample requires 13.30mL of the acid. What is the percent composition of the sample? ww ww