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GENERAL CHEMISTRY-MOD.MASTERINGCHEM.
- When 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_forwardUse the appropriate tables to calculate H for (a) the reaction between MgC03(s) and a strong acid to give Mg2+(aq), CO2(g), and water. (b) the precipitation of iron(III) hydroxide from the reaction between iron(III) and hydroxide ions.arrow_forwardLead 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_forward
- 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_forwardGiven HFH+(aq)+F(aq)Ka=6.9104HF(aq)+F(aq)H2(aq)K=2.7 calculate K for the reaction 2HF(aq)H+(aq)+HF2(aq)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
- Atomic masses can be determined by electrolysis. In one hour, a current of 0.600 A deposits 2.42 g of a certain metal, M, which is present in solution as M+ ions. What is the atomic mass of the metal?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_forwardUse the solubility rules to predict whether the following ionic compounds are soluble in water: (a) Na 3PO 4; (b) Mg 3(PO 4) 2; (c) KOH.arrow_forward
- What volume of 0,955 mol·dm–3 HCl solution (in mL or cm3), is required to titrate 2,152 g of Na2CO3 to the equivalence point? The reaction is: Na2CO3 (aq)+2HCl(aq)→H2O(l)+CO2 (g)+NaCl(aq)arrow_forwardWhat mass of NaOHNaOH is needed to precipitate the Cd2+Cd2+ ions from 30.0 mLmL of 0.530 MM Cd(NO3)2Cd(NO3)2 solution?arrow_forward31. 10.0 mL. of concentrated of H3PO4(aq) is diluted to the final volume of 250.0 mL. Then 15.0 mL. of the diluted H3PO4(aq) is titrated with 0.0455 M NaOH(aq) that one of the product is Na2HPO4(aq). It takes 24.35 mL. NaOH(aq) to complete the reaction. Calculate molarity of H3PO4(aq) in the concentrated solution. a.0.132 Mb.3.00 Mc.0.923 Md.1.85 Marrow_forward
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