Fundamentals Of Analytical Chemistry
9th Edition
ISBN: 9781285640686
Author: Skoog
Publisher: Cengage
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Researchers working with glasses often think of acid-base
reactions in terms of oxide donors and oxide acceptors.
The oxide ion is O2-.
(a) In this system, is the base the oxide donor or the oxide
ассeptor?
(b) Identify the acid and base in each of these reactions:
2 CaO + SiO2
Ca,SiO4
Сa, SiO, + SiOz —2 СaSiO,
|
Сa, SiO, + Ca0 — СазSiO;
13.) Calculate the mass of solid MgSO̟•7H,O that
must be added to precipitate out all of the PO,3- ions in
the form of MgNH¸PO¸ •6H,O from 10.0 mL of a 2.0
M solution of PO,³ (aq)?
A student uses 7.500 grams of oxalic acid (H₂C₂O₄) to make 250.0 cm³ of solution in a volumetric flask. She then transfers 20.0 cm³ of the solution to a conical flask with a pipette. What is the concentration in mol·dm⁻³ of the oxalic in the conical flask?
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- According to the Resource Conservation and Recovery Act (RCRA), waste material is classified as toxic and must be handled as hazardous if the lead concentration exceeds 5 mg/L. By adding chloride ion, the lead ion will precipitate as PbCl2, which can be separated from the liquid portion. Once the lead has been removed, the rest of the waste can be sent to a conventional waste treatment facility. How many grams of sodium chloride must be added to 500 L of a waste solution to reduce the concentration of the Pb2+ ion from 10 to 5 mg/L?arrow_forwardWhen 85.0 mL of 0.250 M Ba(OH)2 solution is added to 85.00 mL of 0.250 M Al (NO3)3 solution, a white gelatinous precipitate of Al(OH)3; is formed. Assuming 100% yield, (a) what mass (in grams) of Al(OH)3 is formed? (b) what is the molarity of each of the ions Ba2+, OH-, Al3+, NO3- in the resulting solution?arrow_forwardCalculate the molarity of AgNO3 in a solution prepared by dissolving 1.44 g AgNO3 in enough water to form 1.00 L solution.arrow_forward
- Lead poisoning has been a hazard for centuries. Some scholars believe that the decline of the Roman Empire can be traced, in part, to high levels of lead in water from containers and pipes, and from wine that was stored in leadglazed containers. If we presume that the typical Roman water supply was saturated with lead carbonate, PbCO3 (Ksp = 7.4 1014), how much lead will a Roman ingest in a year if he or she drinks 1 L/day from the container?arrow_forwardCalculate the concentration of C6H,O6 in an aqueous solution of 4.88x102 M ascorbic acid, H,CgH,O6 (aq).arrow_forwardA 50.0-mL portion of a solution containing 0.200 of BaCl2 · 2H,0 is mixed with 50.0 mL of a solution containing 0.300 g of NalO3. Assumc that the solubility of Ba(IO3), in water is negligibly small and calculate (a) the mass of the precipitated Ba(IO3)2. (b) the mass of the unreacted compound that remains in solution.arrow_forward
- (b) An impure sample of (COOH)2.2H2O that had a mass of 1.00 g was dissolved in water and titrated with standard NaOH solution. The titration required 19.16 mL of 0.198 M NaOH solution. Calculate the percent (COOH)2.2H,O in the sample. Assume that the sample contains no acidic impurities. [molecular weight (COOH),.2H,O = 126 g/mol]arrow_forwardWhich of the units could be used to quantify the concentration of a solution of CuCl2CuCl2 M % mL g M·s–1arrow_forwardChemists working with fluorine and its compounds some- times find it helpful to think in terms of acid-base reac- tions in which the fluoride ion (F¯) is donated and ассеpted. (a) Would the acid in this system be the fluoride donor or fluoride acceptor? (b) Identify the acid and base in each of these reactions: CIF;O2 + BF; CIF,O, · BF, -- TiF, + 2 KF – K2[TiF,]arrow_forward
- What is the concentration of Cl- ions in a solution of 0.30 M FeCl3 (aq) ?arrow_forwardSolution A is 0.2400 M Ca(NO3)2(aq). Solution A is diluted by a factor of 3 to form Solution B. As2O3(s) reacts with NO3- (aq) to produce NO(g) and H3AsO4(aq). When As2O3(s) was added to 27.50 mL of Solution B, 1.710 x 10^21 molecules of NO(g) were obtained from the reaction in 88.75% yield. (a) If As2O3(s) was the limiting reactant, calculate the mass of As2O3 which reacted with NO3-(aq). (b) Determine the number of moles of NO3- in the 27.50 mL of Solution B which remained unreacted at the end of the reaction.arrow_forwardWhat volume of 0.250 M HCl(aq) will completely react with 50.0 mL of 0.115 M NaOH(aq)? Write the balanced reaction and show the stoichiometry. Write the reaction of acetate ion in water. Predict the approximate pH of a solution with acetate ion present.arrow_forward
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