Hard water is a problem for many residential and commercial applications. How can hard water be treated, or "softened"? By filtering the solution with charcoal By adding CaCO3 and MgCO3 By exchanging Ca²+ and Mg²+ ions for Na+ and/or adding a chelating ligand By electrolysis of the solution

Q: What is the oxidation number of Na in sodium metal? O+2 00 minus 8 O minus 4 minus 1 O minus 2

A: Sodium metal has [Ne] 3s1

Q: In determining the manganese dioxide content of a pyrolusite mineral. A sample of 0.5261 g of…

A: Equation representing reaction of KMnO4 with oxalate: 2 MnO4- + 5 C2O42- + 16 H+ = 2 Mn2+ + 10 CO2 +…

Q: addition of S2- ion to Fe(OH)2(s) results in the formation of FeS(s). Explain why the addition of…

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Q: Many transition metals and their compounds are used as catalysts. Given MnO2, FeCl3, Pt, and Ni,…

A: Catalyst are the compounds that lowers the activation energy of reaction to increase the rate of the…

Q: An ore containing magnetite, Fe3O4, was analyzed by dissolving a 1.5419-g sample in concentrated…

A: The question is based on the concept of quantitative analysis. we need to identify mass percentage…

Q: 5. Write a balanced equation to represent a. the roasting of nickel (II) sulfide to form nickel (II)…

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Q: What is the oxidation number of titanium in TiO2?

A: Given :- chemical formula of compound = TiO2  To determine :- Oxidation number of Ti in TiO2

Q: 4. Why can't tin (IV), copper (II), antimony (III) and bismuth (III) ions be separated from silver,…

A: In the given question we have, Cations - Cu2+ , Sn4+ , Bi3+ , Cd2+ and Sb3+ Hydrochloric acid = HCL…

Q: Write the balanced NET ionic equation for the reaction when NH₄Cl and Cu(C₂H₃O₂)₂ are mixed in…

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Q: ОН 1eq. tBuOOH, Ti(OiPr)4 (+)-DET

A: Given that, the reaction is:

Q: Be sure your chemical equation is balanced! ZnS(s) +O2(g) ->

A: We have to write products of the reaction ZnS(s) +O2(g) ->

Q: Write a balanced chemical reaction for the reaction of S2O32- ions with bromine to give bromide and…

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Q: A manganese complex formed from a solution containing potassium bromide and oxalate ion is purified…

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Q: Will the calcium metal be expected to dissolve in dilute hydrochloric acid? And why? Ca²+ (aq) + 2 e…

A: Given that  The standard reduction potential, E° of Calcium:    Ca2+ (aq) + 2 e-    → Ca(s);    E° =…

Q: Why is the oxidation state of Fe 2.5?

A: Iron is a transition metal. It can exists in more than one oxidation state in the bonded state.

Q: Treatment of cobalt(II) oxide with oxygen at high temperatures gives Co3O4. Write a balanced…

A: Given that the reaction of cobalt(II) oxide with oxygen gives Co3O4. To find: Balanced chemical…

Q: Describe the electrolytic process for refining copper.

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Q: When Ni(NO3)2 is dissolved in water it forms a light green solution. When ammonia is added to the…

A: The objective of the question is to explain the color change when Ni(NO3)2 is dissolved in water and…

Electrolysis

Electrolysis is defined as the process of breaking down ionic compounds into their constituent elements by passing a direct electric current through the compound in a fluid state. The cathode reduces cations, while the anode oxidizes anions. An electrolyte, electrodes, and some form of external power source are the main components required for conducting electrolysis. A partition, such as an ion-exchange membrane or a salt bridge, may also be used, but this is optional. These are primarily used to prevent the products from diffusing near the opposing electrode.