Why was Cu prepared from a pure metal? Why was Ca prepared from a salt? Why...

Why was Cu prepared from a pure metal? Why was Ca prepared from a salt? Why is CaCO₃ a better salt for this purpose than CaCl₂?

Expert Solution

queen_honey_blossom answered 1 year ago

Gun metal is (a) Cu + Zn (b) Cu + Sn + Zn (c) Cu + Sn (d) Zn + Sn

Gun metal is___________.(a) Cu + Zn(b) Cu + Sn + Zn(c) Cu + Sn(d) Zn + Sn

Write the ionic equation from the reaction between (zn,Sn, Fe, Mg, Cu, Ca) and HCl

A triple-effect evaporator is a process that removes pure water from a salt water feed. The...

A triple-effect evaporator is a process that removes pure water from a salt water feed. The process consists of three units connected in series. The feed to the process contains 3.43 wt % NaCl in water. In the first effect, sufficient water is evaporated to concentrate the solution to 3.89 wt % NaCl. The second effect concentrates the solution further to 4.22 wt %, and the brine discharged from the process contains 5.02 wt % NaCl. a. Draw a diagram...

A student is given 1.525 g of pure CuO. To recover the Cu present in the...

A student is given 1.525 g of pure CuO. To recover the Cu present in the compound, the dark powdery solid was dissolved in 15.0 mL of 6M HCl, the solution diluted with 50.0 mL of water, and 0.40 g of Mg was added. Was this enough Mg to displace all the Cu2+ ions from the solution? This is not enough Mg to diplace all the Cu2+ ions from the solution. Edit Answer a. If there is not enough Mg...

It requires substantial energy to reduce metal ore to pure metal. The reverse process, corrosion, happens...

It requires substantial energy to reduce metal ore to pure metal. The reverse process, corrosion, happens spontaneously. The rusting of iron, the tarnishing of silver, and the formation of patina on copper and brass are some common examples of corrosion. Rusting is the greatest corrosion problem because it occurs rapidly and because so many objects are made of iron and steel. A great deal of the annual production of iron goes simply to replace that lost by rusting. Iron will...

An EDTA solution was prepared by dissolving the disodium salt in 1l of water. It was...

An EDTA solution was prepared by dissolving the disodium salt in 1l of water. It was standardized using 0.5063 gram of primary standard CaCO3 and consumed 28.50 ml of the solution. The standard solution was used to determine the hardness of a 2L sample of mineral water, which required 35.57 ml of EDTA solution. Express the analysis in terms of ppm CaCO3 ? Answers. 316 ppm

A tank contains 100kg of salt and 2000L of water. Pure water enters a tank at...

A tank contains 100kg of salt and 2000L of water. Pure water enters a tank at the rate 6L/min. The solution is mixed and drains from the tank at the rate 3L/min. ) Find the concentration(kg/L) of salt in the solution in the tank as time approaches infinity. (Assume your tank is large enough to hold all the solution.)

A voltaic cell has one half-cell with a Cu bar in a 1.00 M Cu2+ salt...

A voltaic cell has one half-cell with a Cu bar in a 1.00 M Cu2+ salt and the other half-cell with a Cd bar in the same volume of a 1.00 M Cd2+ salt. (a) Find E o cell , ΔG o , and K. Report your answers to the correct number of significant figures. E o cell = V ΔG o = × 10 J K = × 10 (b) As the cell operates, [Cd2+] increases; find E cell...

Find the concentration of Ca2+ and IO-3 in a saturated Ca(IO3)2 solution prepared by adding Ca(IO3)2...

Find the concentration of Ca2+ and IO-3 in a saturated Ca(IO3)2 solution prepared by adding Ca(IO3)2 to a 0.015 M solution of KIO3. Ksp of Ca(IO3)2(s) is 4.4x10-7M3.

Question: Why do you think that infusion of pure sodium-free β-hydroxybutyric acid prepared resulted in a...

Question: Why do you think that infusion of pure sodium-free β-hydroxybutyric acid prepared resulted in a 50% decrease in renal ammoniogenesis in spite of the fact that both urinary pH and plasma bicarbonate fell significantlyWhy do you think that infusion of pure sodium-free β-hydroxybutyric acid prepared resulted in a 50% decrease in renal ammoniogenesis in spite of the fact that both urinary pH and plasma bicarbonate fell significantly Article: (based off of this little exerpt) During all experiments where ketones were...

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