Table 8.1 Hardness determination of water samples. mL of Volume of NazH2Y 2 H2O, mL Ca2+, mg/L Replicate Sample Initial Final Volume added (mean+SD) 54 mL 15.1 15.1 1 54 mL 15.1 30.7 15.6 54 mL 30.7 45.3 14.6 3 Sample Calculations (show calculation for one replicate only) (ml of titranteample) (M of titrant)(40000) mL of sample mg. Ca²+ mg Са2+ 2.
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- A solution of HCl was titrated against sodium carbonate. What is the titer for Trial 1 in the given data? T2 0.3562 0.3479 0.3042 Weight (g) Initial V (ml) 0.80 1.60 35.20 36.70 39.80 Final V (ml) Vol HCI used (ml) 35.10 N of HC (eq/L) 0.1954 0.1870 Average N of HCl (eq/L) AUEid- 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 Then3:46 1 ul 5G OKINETICS AND EQUILIBRIUM Calculating the solubility of an ionic compound when a commo. db Data Bacro4 1.17x10-10 Calculate the solubility at 25 °C of AgCl in pure water and in a 0.0030M AGNO, solution. BasO4 1.08x10-10 Round both of your answers to 2 significant digits. CaCo, 3.36x10-9 CaFa 3.45x10-11 Co(OH)2 5.92x10-15 solubility in pure water: CuBr 6.27x10-9 CucOs 1.4x10-10 solubility in 0.0030 M AgNO, solution: 0: Fe(OH)2 4.87x10-17 7.40x10-14 PbCro4 2.8x10-13 PbF2 3.3x10-8 Mg(OH)2 5.61x10-12 Ni(OH)2 5.48x10-16 AgBro 5.38x10-5 Ag;CO 8.46x10-12 AgC 1.77x10-10 AgzCro4 1.12x10-12 Srco, 5.60x10-10 ZnCo 1.46x10-10 Zn(OH)2 2.0x10-1 AgBr 5.35x10-13 AuCI 1.77x10-10 Explanation Check 2021 MGrew tton ARhs 23 TO MacBook Air
- 10. 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.The analysis of a water is as follows Ca+ 78 20 Specie [mg/L] Alkalinity SO,2- CH pH 96 8.1 282 Na+ 106 K+ Mg2+ 30 126 12 Draw a meq/L bar graph (a) (b) Determine the Calcium carbonate and non-carbonate hardness in meq/L. (c) Determine the Magnesium carbonate and non-carbonate hardness, in meq/L. ca-NCH, Mng-eH mg-NCH. ull Ca- CH3) Fluoridated teeth, CaF2 has a Ks.p. = 6.5 x 10-11. How many grams of Calcium would dissolve per 100 ml : (a) in pure water, (b) in a 0.75M AIF3 solution
- 5. A 300.0 mg sample containing Na,CO3, NaHCO3 and NaOH and inert material either alone or in some combination was dissolved and titrated with 0.1000 M HCI the titration required 24.41 mL to reach the phenolphthalein endpoint. And an additional 8.67 mL to reach the methyl red endpoint. Determine the composition of the sample and calculate the percent of each titrated component.Calculate the molar solubility and [Ag*] of silver benzoate, AgC,H5COO (Ksp = 2.5 x 10-13) in the following medium: (C,H;COOH: K, = 6.46 x 105; Ag(NH3)2": Kra = 2.1x10°; Kr2 = 8.2x10°) 21. in water Answer = [ Select] 22. in 0.0100 M AGNO3 Answer = [ Select] 23. in solution buffered at pH 5.00 Answer = [ Select] 24. in solution free ammonia concentration of 0.100 M NH3 Answer = [ Select] >A titrant solution of KMNO4 was standardized with 0.2g of Na2C2O4 amd consumed 27.75 mL to reach endpoint. What is the standardized normal concentration of the titrant?
- ng resourc.. (27) Could've Been - [References] Calculate the pH at the halfway point and at the equivalence point for each of the following titrations. a. 100.0 mL of 0.30 M HC7H502 (Ka = 6.4 x 10-5) titrated by 0.10 M NaOH pH at the halfway point = pH at the equivalence point = b. 100.0 mL of 0.40 M C2H;NH2 (K½ = 5.6 × 10¬4) titrated by 0.10 M HNO3 pH at the halfway point = pH at the equivalence point = c. 100.0 mL of 0.70 M HC1 titrated by 0.15 M NaOH pH at the halfway point = pH at the equivalence point =Acid-Base titration: Standardization of 0.1 M NAOH Trial 1 Mass KHP used, g 0.297 g Final reading Volume NaOH, mL 15.59 mL Initial reading Volume NaOH, mL 0.23 mL Volume NaOH consumed, mL 15.36 mL Moles KHP used Moles NaOH used Molarity of NaOH solution30mL 0.9% v/v green food coloring. Transfer 2mL of of food coloring to flask, QS the flask to 100mL with DI water. What is the concentration of the standard?