Use the pC-pH diagram for open carbonate system to find the equilibrium pH for a solution prepared by adding 10-5 mole pH 8. 9. 10 11 12 13 14 1 2. 3. 4. 5. 6. 8. 9. 10 11 12 13 14 Na2CO3 into 1L DI water. Hint: the solution is equilibrated with air above. Can you also show the purpose and relationship of the other lines on the graph as it relates to the question? Thanks!
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- 1.Determine the color of the indicator in a given condition: METHYL ORANGE IN AN ACIDIC ENVIRONMENT. 2.This is the measure of reproducibility of data within a series of results. 3.This is the chemical to be subjected to testing in titrimetric method of analysis. 4.Determine the type of assay employed for this substance: TARTARIC ACID 5.Determine the color of the indicator in a given condition: PHENOLPHTHALEIN IN AN ALKALINE ENVIRONMENT. Please help me answer this questions. the answers are on the image I attachedFull acid, HOOC = CH-COOH is a biphatic acid and we will label it as H2M. Acid constant data for the two protonation phases of the acid: K H.M+H2O = H, 0++HM- HM +H2O = H, 0++M2– a1 = 1.3x10-2 K.2 = 5.9 x 10-7 Measure 0.1 ml of 0.100 M of malic acid with 0.100M NaOH and measure the H variability as a function of the added base volume. A. Calculate the PH value at the beginning of the titration. B. Calculate the pH value at the first equivalent point. C. Calculate the pH value at the second equivalent point. D. Draw the titration curve in the graph. Indicate in the graph titles and units for the axes.A standard solution is prepared by completely dissolving 0.4 grams of CaCl2 and 0.2 grams of MgCO3 salts in 1-Liter DI water in a glass bottle closed to the atmosphere. The equilibrium pH of the standard solution is adjusted to 7.3 using acid-base solutions. Assuming the amounts of acid and based used in the initial pH adjustment is negligible, calculate : Temporary and permanent hardness of the solution as mg/L CaCO3. Total alkalinity and acidity as mg/L CaCO3. Useful information for problem :
- The water sample from the polluted estuary (number 4), was then subjected to a series ofinstrumental analysis like chromatography and spectroscopy to determine the exact identities of thepollutants. What kind of analysis are done to the unknown?a. Qualitative analysisb. Quantitative analysisc. Characterization analysisd. Fundamental analysisA commercial vinegar was analyzed by titration to determine the percent acetic acid. Briefly, 10.00 mL of vinegar sample was diluted to 100. mL solution in a volumetric flask. A 25.00 mL aliquot from the diluted vinegar required 25.55 mL of 0.1005 M sodium hydroxide to reach the phenolphthalein endpoint From this experiment which is the standard solution used in titration? CH3COOH NaOH NaCH3COO C20H14O40.1 g of the mixture of na2so4 and k2so4 is taken and 100 ml of solution is prepared. 10 ml of this prepared solution is placed in a beaker and some distilled water is added. A mass of 15.5 mg is obtained by precipitation with Bacl2 at PH=5, then filtering and bringing to a constant weight at 800 °C. Calculate the percentages of Na2so4 and K2so4 in the mixture accordingly.
- You place a beaker containing 1 kg of water in contact with an atmosphere that has a CO 2partial pressure of 10 -2.5 atm and you allow free exchange of gas until equilibrium is established(remember K H =10-1.5 ), then you cap the solution and change the pH by titration. There is nosubsequent exchange of gas with the atmosphere.Please answer the following questions about the solution speciation:a) What is the mass balance equation for dissolved carbonate? Is this a closed or open system?How much amount (in grams) do you need to prepare the following solutions 500.0 mL 0.1000 M stock EDTA solution from Na2H2EDTA•2H2O (FW=372.24) and MgCl2•6H2O crystals 100.0 mL 0.0500 M stock Ca2+ solution from pure CaCO3 (FW=100.09) and concentrated HCl 250 mL 1.0 M NH3-NH4+ pH 10 buffer solution from NH4Cl and NH3Sketch a plot of the fraction of species, f, vs pH for Tyr. Show your calculations for several points on the plot. You want to calculate the fraction of the species for more than 3 of the points. pKa’s for Tyr is 2.24, 9.04, and 10.10.
- Determine the pH and concentration of all species at equilibrium for the basic 5-fluorouracil species (C4HFN2O22-). Justify the use of approximations if necessary.Provide the equation for the mass balance of this solution. C4HFN2O22-= 0.30 MIf the test tube used in the determination of the ΔHrxn for nitric acid (neutralization with NaOH) was still wet with water, will the magnitude of ΔHrxn increase, decrease, or remain the same?Please explain.Calculate the volume in liters of 0.545 M KOH necessary to titrate 0.0113 moles of hydrochloric acid, HCl, to a phenolphthalein end-point. Report the answer with three significant figures.