Philippine Toxic and Hazardous Wastes Act places limits on the quantities of toxic substances that may be discharged into the sewerage system. Guidelines on hexavalent chromium (Cr6+) limits the discharge amount to just 0.50 mg/L. If an industry dumps hexavalent chromium in the form of potassium dichromate (K2Cr2O7), what is the maximum allowable concentration of hexavalent chromium in moles per liter of sewage water?

Q: PCl3(g) + 3 NaF(s) PF3(g) + 3 NaCl(s) K = 9.78 x 1031 If 12.56 g of NaF(s) and 17.89 g of NaCl(s)…

A: The given equilibrium reaction is: PCl3(g) + 3NaF(s)  -----> PF3(g) + 3NaCl(s) ; K = 9.78*1031…

Q: The following chemical reaction takes place in aqueous solution: Fe(NO3)₂(aq) + (NH4)₂S (aq) → FeS…

A: 1. Write the balance  molecular  equation . 2. Break  every thing down into it's ion except the…

Q: o analyze the alcohol content of a certain wine, a chemist needs 0.57 L of an aqueous 0.367 M K 2Cr…

A: Solution - According to the question - Given - Volume of K2Cr2O7 solution = 0.57 L Molarity…

Q: For the analysis of trace metals it is necessary to prepare solutions of very low concentrations…

A: To solve this question we use the total volume strength formula.

Q: What mass of solid PbSO4 can be formed by mixing 35.0 mL of aqueous 0.500 M Pb(NO3)2 with 25.0 mL of…

A: Answer: This question is based on the concept of limiting reagent. It is the reactant that exhaust…

Q: Sulfuric acid is a solution of hydrogen sulfate, H2SO4, in water. When concentrated, it is extremely…

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Q: What would be net equation be for sodium acetate with boric acid added to produce a solution?…

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Q: Calcium carbonate is used to treat calcium deficiencies in the body.  Your body needs calcium to…

A: Since we know that Molarity = number of moles of solute/Volume of solution in Liter  To solve this…

Q: A diluted bleach solution was found to have a concentration of 0.0250 M. It was originally prepared…

A: Given that : The concentration of diluted bleach solution = 0.0250 M The final volume of solution =…

Q: If an aqueous solution of Fe2(SO4)3 has an overall concentration of 5.0 M, what is the concentration…

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Q: 4. Complete and balance the following equations. Then, write balanced net ionic equations. i. Ag2CO3…

A: Always the reaction is expressed in balanced form and the reaction here is the ionic one .

Q: Calculate the molar concentration of the solution formed when 69.68 g of MgSO4 * 6 H2O is dissolved…

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Q: A student has 510.0 mL of a 0.1345 M aqueous solution of CoCl2 to use in an experiment. She…

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Q: Calculate the volume in mL of 1.50 M K₂SO4 (aq) that must be diluted with water to prepare 250 mL of…

A: Given, Stock solution of K2SO4 Concentration K2SO4 solution (M1) = 1.50 M Volume of the K2SO4…

Q: Exercises ough solution through the tip The top of the solution should Balance each chemical…

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Q: What is the concentration of an aqueous caffeine solution that is prepared by dissolving 36.8 g of…

A: We are having 36.8 g of caffeine, C8H10N4O2 Molar mass of caffeine, C8H10N4O2  = (12*8 +…

Q: What is the molarity of C6H12O6 in an aqueous solution that is prepared by dissolving a 25.91 g…

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Q: In the laboratory, a student adds 24.2 g of ammonium chloride to a 500. mL volumetric flask and adds…

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Q: 3NaOH(aq) + FeCl3 3NaCl(aq) + Fe(OH)3(s) A. Calculate the volume of 0.200M FeCl3 solution needed to…

A: The balanced reaction taking place is given as, => 3 NaOH (aq) + FeCl3 (aq) ------> 3 NaCl…

Q: What is the nickel ion concentration in a solution prepared by mixing 381 mL of 0.395 M nickel…

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Q: Calculate the concentration of the aqueous product that forms when 0.111 L of 0.017 M CaBr2 is added…

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Q: The water in a certain pool has a concentration of 3.38 mg/L of Fe^3+ ions. Express this value as…

A: Given  Concentration of Fe3+ = 3.38 mg/L Concentration in parts per billion =?

Q: eus to prepare 250 mL of a 0.500 M aqueous solution of sucrose, C12H22 biological experiments. (aq),…

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Q: Calculate the total concentration, in molarity, of hydroxide ions when 1,949.5 milligrams of…

A: Given, mass of magnesium hydroxide [Mg(OH)2] = 1949.5 mg = (1949.5/1000) mg = 1.9495 g Concentration…

Q: Assuming that 8.575 kg of NaCl (Hint: NaCl is a strong electrolyte) is distributed across a roadway,…

A: Freezing point determination using colligative properties.

Q: A 13.00 mL sample of sulfuric acid is diluted to 40.00 mL. A 10.00 mL aliquot is titrated to a…

A: Titration is one of the most common methods of qualitative analysis of substances given. It is done…

Q: A volume of 125.0 mL of 0.565 M KOH (aq) is diluted with 425.0 mL of pure water.  What is the final…

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Q: a student carries out this chemical reaction in a beaker  Zn+CuCl2 -> Cu+ZnCl2 after the reaction…

A: A student carries out this chemical reaction in a beaker  Zn+CuCl2 -> Cu+ZnCl2 After the reaction…

Q: How many moles of the nitrate anion, NO3-1, are there in a 0.015 L sample of 0.15M Pb(NO3)2(aq)…

A: Given, the volume of solution =0.015 LConcentration of Pb(NO3)2(aq) =0.15 Mwe are asked to calculate…

Q: was dissolved and the manganese present was converted to MnO4– (aq). Water was then added to give a…

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Q: Chlor-alkali plants electrolyze Nacl to produce the commodity chemicals caustic soda and chlorine…

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Q: What is the molar concentration of sodium chlorate in this sample?

A: Molarity is the ratio of number of moles of solute to the volume of solution (in L)

Q: The concentration of SO42– ions in a 45.0 mL sample of seawater is determined by adding a solution…

A: Given information: Mass of barium sulfate = 0.315 g Volume of sample = 45.0 mL or 0.045 L