Alkalinity is normally measured in terms of CaC03. What is the formula weight of this compound? In what way might this formula weight make CaC03 a convenient reference material for alkalinity?
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Alkalinity is normally measured in terms of CaC03. What is the formula weight of
this compound? In what way might this formula weight make CaC03 a convenient
reference material for alkalinity?
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- A 0.2500 g sample containing calcium carbonate spends 40.00 mL of a 1 M EDTA solution. Calculate the percentage of calcium contained in the sample, expressed as CaCO3.Silica (SiO2) is an impurity that must be removed from ametal oxide or sulfide ore when the ore is being reduced toelemental metal. To do this, lime (CaO) is added. It reactswith the silica to form a slag of calcium silicate (CaSiO3),which can be separated and removed from the ore.(a) Write the balanced equation for this process.(b) Can this be considered a Lewis acid–base reaction? Ifso, what is the Lewis acid and what is the Lewis base?A water sample has exact alkalinity of 220 mg/L CaCO3. The sample contains150.0 mg/L HCO3 at a pH of 7.1 (Temperature = 25 oC).(a) Calculate the carbonate alkalinity in mg/L as CO3.(b) Calculate the approximate alkalinity.(c) Comment on the difference between the exact and the approximate alkalinity
- To oxidize the iron in 1.00 gram of FeSO4·(NH4)2SO4·6 H2O requires 5.00 mL of HNO3.(Fe 2++ NO3― + H+→ Fe 3++ NO + H2O)How much water must be added to 500 mL of this acid to make the concentration as an acid exactly one-tenth normal?Which is a weaker acceptor (analogous to weaker acid)? In, CuWhich is a weaker donor (analogous to weaker base)? As, MnA 4.912-g sample of a petroleum product was burnedin a tube furnace, and the SO2produced was collectedin 3% H2O2.Reaction:SO2(g)+H2O2→H2SO4A 25.00-mL portion of 0.00873 M NaOH was introducedinto the solution of H2SO4, following whichthe excess base was back-titrated with 15.17 mL of0.01102 M HCl. Calculate the sulfur concentrationin the sample in parts per million.
- What volume of0.317 M KOH solution will be required to titrations 25.00 mL of 0.285 M HN O3If the alkalinity of the water is 306ppmNa2CO3 what does this mean?A solution containing two alkaline earth metals ions is made from 0.050 M BaCl2 and 0.025 M CaCl2. What concentration of SO42- must be present to leave 99.99% of only one of the cations in solution?
- 1.) A solution of PbI2, has an Iodide concentration [I−]=3.0×10−3. 1.a) Write out the equilibrium reaction for the lead iodide (make sure to label with (s), (aq), and to balance the reaction). 1.b) What is the concentration of the [Pb+2]. 1.c) What is the Kspfor the reaction.Nahso3 titr. In neutral describe how the color goes from Mn04- to MnO2 In basic w NaOH describe how the color goes from MnO4- to MnO4 2-When Fe3+ is reacted with 0.10M KSCN, what is the reaction that occurs? What's this type of reaction called and what color does the solution turn?