3. Molecular : Ca(NO3)2(aq) + Hg2I2(s) -> Hg2(NO3)2(aq) + Cal2(aq) Detailed ionic : + + + Net ionic : + 4. Molecular : Cu(OH)2(s) + HCIO3(aq) → Cu(CIO3)2(aq) + H2O() Detailed ionic + -> + Net ionic + + 5. Molecular : Mg(OH)2(s) + H2SO4(ag) M9SO«(aq) + H20() Detailed ionic + + + Net ionic + +
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- Potassium permanganate in acidic solution is used to titrate a solution of copper(I) ions, with which it reacts according to MnO4-(aq) + 5Cu+(aq)+8H3O+(aq)Mn2+(aq) + 5Cu2+(aq)+12H2O(l) A potassium permanganate solution is prepared by dissolving 23.14 g of KMnO4 in water and diluting to a total volume of 1.000 L. A total of 15.61 mL of this solution is required to reach the endpoint in a titration of a 200.0-mL sample containing Cu+(aq). Determine the concentration of Cu+ in the original solution.Complete, balance, and write the Q expressions: _C3H8(g) + _O2(g) <--> _CO2(g) + _H2O(g) Q = ___________ _NO(g) <---> _N2O (g) + _NO2(g) Q = ___________ _KOH(aq) +_HOAc(aq) <---> _____(aq) + ___(l) Q = ___________ _Al(s)+_CuSO4(aq) <--> _______(aq)+_Cu(s) Q = ___________Use the following atomic masses (in g/mol): Mg = 24.31; O = 16; Ca = 40.08; C = 12.01; Na = 23; H = 1; N = 14.01; S = 32.06; Cl = 35.45 In the assay of NaHCO3, 3.0g of the solid is dissolved in 25mL water. What is the normality? How many mL of 1N H2SO4 will be required to neutralize this solution? From this volume of acid, compute the percent purity of NaHCO3.
- The hardness of water (hardness count) is usually expressed in parts per million (by mass) of CaCO3, which is equivalent to milligrams of CaCO3 per liter of water. What is the concentration of Ca2+ ions in water sample with a hardness count of 188 mg CaCO3/L?Chromium is a priority metal pollutant and potential carcinogen that exists in two major oxidation states (Cr III and Cr VI) in aquatic environments. In aqueous solution, Cr VI exists as the highly soluble oxyanions HCrO4- and CrO42-, and Cr III exists as Cr 3+ (aq) and hydroxo species. Toxicologists believe that Cr VI oxyanions are the principle health concern. Changes in oxidation state have a dramatic effect on chromium solid/solution partitioning and migration in soils and aquifer sediments. Use the provided thermodynamic data and with the aid of the solubility diagram for Cr III as a function of pH, solve for the following questions. For an industrial wastewater that contains 1.0×10-4 M total CrVI at pH 8, a very common approach to remove Cr VI from water is to reduce Cr VI to Cr III, thereby forming the Cr(OH) 3 (s) precipitate that can be easily separated from water. The reduction can be accomplished by addition of ferrous sulfate (FeSO4 ) to the water. 1. If the amount of…To prepare 50 mL solutions of 0.01 M KMnO4 in water (calculation to prepare chemicals in spectrophotometer)
- Lead(II) chromate (PbCrO₄) is used as the yellow pigmentin traffic lanes, but is banned from house paint because of therisk of lead poisoning. It is produced from chromite (FeCr₂O₄),an ore of chromium:4FeCr₂O₄(s) +8K2CO3(aq)+ 7O₂(g)→2Fe₂O₃(s)+ 8K₂CrO₄(aq)+ 8CO₂(g) Lead(II) ion then replaces the Kion. If a yellow paint is0.511% PbCrO₄by mass, how many grams of chromite areneeded per kilogram of paint?A fertilizer railroad car carrying 34,300 gallons of commercialaqueous ammonia (30% ammonia by mass)tips over and spills. The density of the aqueous ammoniasolution is 0.88 g>cm3. What mass of citric acid,C(OH21COOH21CH2COOH22, (which contains three acidicprotons) is required to neutralize the spill? 1 gallon = 3.785 L.Cocaine (C17H21O4N) is a natural substance found in the leaves of the coca plant, which has been used for centuries as a local anesthetic and stimulant. Illegal cocaine arrives in the USA either as a pure compound or as the hydrochloride salt (C17H21O4NHCl). At 25oC, the salt is very soluble in water (2.50 kg/L), but pure cocaine is much less so (1.70 g/L). What is the maximum amount of salt (in gram) that can dissolve in 50.0 mL of water? [1 mark.] When a 25 mL aqueous solution that contains 62.50 g of the salt is treated with NaOH, the salt is converted to pure cocaine. How much water (in liters) is needed additionally to dissolve the formed pure cocaine? Round your final answer off to two decimal points. C17H21O4NHCl(aq) + NaOH(aq) → C17H21O4N(aq) + H2O(l) + NaCl(aq)
- Formaldehyde (CH2O, MM = 30.03) has a multitude of uses includingtissue preservation. Formalin is a commercially available solution offormaldehyde and has a concentration of 19.6 m formaldehyde anda density of 1.09 g/cm3. What is the mass% of formaldehyde in thesolution?Given the reactant side of the total ionic equation for the neutralization reaction of lithium hydroxide (LiOHLiOH) with hydrochloric acid (HClHCl), write the total ionic equation (also known as the complete ionic equation) by entering both the reactant and the product species, separated by the reaction arrow. Li+(aq)+OH−(aq)+H+(aq)+Cl−(aq)→ ? Be sure to include the charges on the ionic species and the physical state of all the reactant and product species.Andrew dissolved 10.00 grams of an iron ore sample in 5.00 L of acid to produce a stock solution. Josh ran a trial of the analytical procedure on the stock solution, but found the solution was too concentrated to be used. So Josh prepared a 1:250 dilution of the sample solution, and, after running the analytical procedure successfully, found the solution contained 1.62 x 10-5 mol/L Fe2+ (aq). What is the mass of iron in the meteorite sample?