Identify different industries and commercial products where the gravimetric analysis can be used and discuss the significance of gravimetric analysis in the above identified industry/commercial products (minimum three).
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A: Silver chloride = AgCl Ksp = 1.8×10-10
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Q: 3. A 466g sample of water is heated from 8.50°C to 74.60°C. Calculate the amount of heat absorbed…
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- Calculate the gravimetric factor of the following. 2 Fe3O4 is sought(Analyte), 3 Fe2O3 is weighed (Precipitate)Identify different industries and commercial products where the gravimetric analysis can be used and discuss the significance of gravimetric analysis in the above identified industry/commercial products (minimum three).Calculate the gravimetric factor of the following. 2 Fe3O4 is sought(Analyte), 3 Fe2O3 is weighed (Precipitate) 2 Fe is sought(Analyte), 1Fe2O3 is weighed (Precipitate)
- Do you agree/disagree with the following statement below? State your reasons. "Classical precipitation gravimetric analysis is best used towards the end of quantitative analysis while classical volumetric analysis is best used as the first technique to quantify analytes."A sample containing BaCl, 2H,0, KCI and inert material weighed 0.8417 g. After heating the sample at 160°C for 45 min, it weighed 0.8076 g. The sample was then dissolved in water and treated with a slight excess of AgNo,. The resulting precipitate was collected and found to weigh 0.5847 g. Calculate the % Bacl,-2H,0 and % KCI in the sample. 3.Predict three (3) correct apparatus used for the procedures experiment run by a chemist below. Determination of phosphorus in plant food will produced magnesium ammonium phosphate, MgNH4PO4.6H2O, precipitate. The precipitate was kept in a crucible and dry at 130 °C for 2 hours. Then, the precipitate was cooled for 15 minutes in a condition of low moisture atmosphere. The precipitate is weighed until constant weight is obtained.
- A chemist receive different mixtures for analysis with the statement that it contain NaOH, NaHCO3 , Na2CO3 or compatible mixtures of these substances together with the inert material. From the data given, identify the respective materials and calculate the percentage of each component. 1.000g samples and 0.2500 N HCl were used in all cases. Sample 1 With phenolphthalein as the indicator, 24.32 ml of HCl was used. A duplicate sample required 48.64 ml HCl using methyl orange as the indicator. Sample 2. With phenolphthalein as the indicator it uses 28.2 ml of HCl to make it colorless and added with methyl orange indicator and uses 11.3 ml of HCl to reach the end point.A solution of HCl was titrated against sodium carbonate. What is the average normality of acid in the given data? (MW Na₂CO3 = 106) T2 0.3479 0.3562 0.3042 Weight (g) Initial V (ml) 0.80 1.60 35.20 36.70 39.80 Final V (mL) Vol HCl used (mL) 35.10 39.40 N of HCl (eq/L) 0.1954 0.1870 Average N of HCl (eq/L)Compare the two quantities based on the given condition: Gravimetric determination of chloride as AgCl I. Mass of precipitate if peptization occurred II. Mass of precipitate if occlusion occurred (a) I > II (b) I = II (c) I < II (d) The two quantities cannot be compared due to insufficient information.
- The aluminum in a 1.200-g sample of impure ammonium aluminum sulfate was precipitated with aqueous ammonia as the hydrous Al2O3.xH2O. The precipitate was filtered and ignited at to give anhydrous Al2O3, which weighed 0.2001 g. Express the result of this analysis in terms of %NH4Al(So4)2 %Al2O3 %AlWhich of the following is the gravimetric factor formula for the following pair of substances? FW stands for formula weight. Choices are attached below. Sought-for Constituent Substance Weighed ZnO Zn2P2O7A STOCK SOLUTION containing 0.1581 g/L K2CrO4 was prepared.In order to make the CALIBRATION STANDARD, 5 ml of the STOCK was transferredinto a 50ml volumetric flask and then diluted with an appropriate solvent.Calculate:(a) The ppm of K2CrO4 in the CALIBRATION STANDARD.(b) The molarity of K2CrO4 in the CALIBRATION STANDARD. (c) Calculate the molar absorptivity of K2CrO4 (at 371.0 nm). Assume that Beer's Law isobeyed over this concentration range.At 371.0 nm, this CALIBRATION STANDARD in a cell of path length 1.00 cm gave a %T of 59.752.