Chemistry

Chemistry, 30.06.2019 01:30, noathequeen

The magnesium and calcium ions present in seawater ([mg2+] = 0.059 m and [ca2+] = 0.011 m) can be separated by selective precipitation with koh. what is the concentration of [mg2+] when ca(oh)2 starts to precipitate? ksp mg(oh)2 = 2.1 x 10-13 and the ksp ca(oh)2 = 4.7 x 10-6

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Chemistry, 06.07.2019 06:00, lilspike420

Report your answer with the proper number of significant figures. magnesium is used in lightweight alloys for airplane bodies and other structures. the metal is obtained from seawater in a process that includes precipitation, neutralization, evaporation, and electrolysis. how many kilograms of magnesium can be obtained from 8.01 km3 of seawater if the initial mg2+concentration is 0.12% by mass? (d of seawater = 1.04 g/ml)

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Chemistry, 10.07.2019 16:30, ahmetagayew2004

Magnesium is lighter than other structural metals, so it is increasingly important in the design of more efficient vehicles. mg2+ ions are present in seawater, and the metal is often prepared by "harvesting" these ions and converting them to mg metal. the average magnesium content of the oceans is about 1270 g mg2+ per ton of seawater, and the density of seawater is about 1.03 g/ml. what is the molarity of mg2+ ions in seawater? the design for a concept car calls for 125 kilograms of magnesium per vehicle. how many gallons of seawater would be required to supply enough magnesium to build one of these cars?

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Chemistry, 13.07.2019 20:10, paigemeyers6

Provide complete solutions in a separate sheet.) steps involved in the extraction of magnesium from seawater in the dow process, starting as mg(oh): using quicklime (cao), until the electrolysis of molten (a) describe from the precipitation of mg mgcl, to produce magnesium metal. provide a relevant balanced equation for cach step. b) if the concentration of mg " in seawater is 0.055 m, how many kilograms of calcium oxide, cao., are required to precipitate all of mg as mg(oh): in 1.00 x 10 gallons of seawater? (c) how many grams of magnesium m entire dow process has a net yield of 91.0%? d) the final step in the dow process involves electrolysis of molten mgcl2 to produce mg and cl. how many kilograms of magnesium can produced in 1.00 hour if the electrolytic cells deliver a constant current of 1.0 x 10 a? (e) name two major industrial uses of magnesium metal.

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Chemistry, 14.08.2019 08:20, lilisncz

The seven most abundant ions in seawater make up more than 99% by mass of the dissolved compounds. here are their abundances in units of mg ion/kg seawater: chloride 18,980; sodium 10,560; sulfate 2650; magnesium 1270; calcium 400; potassium 380; hydrogen carbonate 140. (a) what is the mass 96 of each ion in seawater? (b) what percent of the total mass of ions is sodium ion? (c) how does the total mass % of alkaline earth metal ions compare with the total mass 96 of alkali metal ions? (d) which make up the larger mass fraction of dissolved components, anions or cations?

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The magnesium and calcium ions present in seawater ([mg2+] = 0.059 m and [ca2+] = 0.011 m) can be se...

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