Titration Heating Volume of DCIP (ml) Average Amt of Conc of #3 time vol of Vit C in Vit C Sample (mg) (min) DCIP (mg/ml) Initial Final Difference (ml) la 26.30 34.60 8.3 7.45 0.15 0.03 lb 34.60 41.25 6.65 2a 26.0 31.50 5.5 5.375 2b 5 31.5 36.75 5.25 За 15 41.25 46.15 4.9 4.925 3b 15 15.8 20.75 4.95 4a 30 36.75 41.10 4.35 3.80 4b 30 41.10 44.35 3.25
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Calculate the average concentration of Vitamin C in each sample
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- 100 ml g 0:4 Nof H sq mixed aiith Final Normaliliy og Result toletian is 100m) op 02 N NEOH, Then A) 0.1 B) 0-2 c) 0 3 D) 0.4Solid cobalt (II) acetate is slowly added to 125 mL of 0.0945 M ammonium chromate solution. What is the concentration of cobalt required to just initiate precipitation? The Ksp of CoCrO4 is 7.1 * 10 -4. Report answer in scientific notation to two sig figs.The expression for K and K, for the reaction PH,BCI,(s) - PH,(g) + BCI,(g) K = [PH,J[BCI,1/[PH3BCI3] and K, = P(PH,)'p(BCI,) Select one: True False
- 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 ThenOne of the following statements is incorrect Select one: O Back-titration is required when the rate of the reaction slow. O A standard solution should react completely with the analyte without a definite chemical equation. Standardization is required when the titrant solution molarity is approximate. O A primary standard should be highly pure, has atmospheric stability and absence of hydrated water. O Titration error is the difference between equivalence point volume and end point volume.I1.6. A lo0mL solntion g 0.050MM tuffered to pHq.00 was titrates rith n+ 0. OSD OMEDTA. ca) Hhat is the egniralene volume, Ve in milliliters? (b) Caleulate Hhe concenpration f m" at nt
- What is the solubility of Zn3(PO4)2 if it's Ksp is 5.000e-36?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/?1.10 M Acetic acid 0.900 M Sodium acetate Solution (mL) |(mL) [H3o*1 (M) 1 8.00 2.00 8.71e-5M 2 7.00 3.00 5.13e-5M 3 6.00 4.00 3.24e-5M 4 5.00 5.00 4.00 6.00 6. 3.00 7.00 7 2.00 8.00 8 1.00 9.00
- WARIARTAM 2. 1.2589 g of a certain brand of milk powder required 25.89 mL of 0.01873M EDTA to titrate the calcium contained in the sample. (a) What is the percent calcium in the sample? (b) Would the true result be higher, lower, or not be affected if the milk powder sample has been slightly wet?O KINETICS AND EQUILIBRIUM Calculating the solubility of an ionic compound when a commo... oh Data Formula Ksp Calculate the solubility at 25 °C of Zn(OH), in pure water and in a 0.0060M ZnSO , solution. BaCrO4 1.17x10-10 BaSO4 1.08x10-10 Round both of your answers to 2 significant digits. CaCO3 3.36x10-9 CaF2 3.45x10-11 solubility in pure water: Co(OH)2 5.92x10-15 CuBr 6.27x10-9 solubility in 0.0060 M ZNSO4 solution: CuCO3 1.4x10-10 Fe(OH)2 4.87x10-17 PbCO3 7.40x10-14 PbCrO4 2.8x10-13 PBF2 3.3x10-8 Mg(OH)2 5.61x10-12 Ni(OH)2 5.48x10-16 AgBrO3 5.38x10-5 A92CO3 8.46x10-12 AgCI 1.77x10-10 Ag2CrO4 1.12x10-12 SrCO3 5.60x10-10 ZnCO3 1.46x10-10 Zn(OH)2 3.0x10-17 AgBr 5.35x10-13 AuCl 1.77x10-10 Explanation Check Terms of Use Privacy O 2021 McGraw-Hill Education. All Rights Reserved 18 MacBook Air oloO KINETICS AND EQUILIBRIUM Calculating the solubility of an ionic compound when a commo... Calcula alo solubility at 25 °C of CuBr in pure water and in a 0.0070M COBT, solution. Data Round both of your answers to 2 significant digits. Formula Ksp BaCro4 1.17x10-10 BaSO4 1.08x10-10 solubility in pure water: CaCO3 3.36x10-9 CaF2 3.45x10-11 solubility in 0.0070 M CoBr, solution: Co(OH)2 5.92x10-15 CuBr 6.27x10-9 CUCO3 1.4x10-10 Fe(OH)2 4.87x10-17 PBCO3 7.40x10-14 PbCr04 2.8x10-13 PBF2 3.3x10-8 Mg(OH)2 5.61x10-12 Ni(OH)2 5.48x10-16 AgBrO3 5.38x10-5 Ag2CO3 8.46x10-12 AgCl 1.77x10-10 Ag2Cr04 1.12x10-12 SrCO3 5.60x10-10 ZnC03 1.46x10-10 Zn(OH)2 3.0x10-17 AgBr 5.35x10-13 1.77x10-10 2021 McGraw-Hill Education. All Rights Reserved Check AuCl Explanation Tems of Use Pv 18