What substance is present if the iodine test gives a dark blue color change

Q: sodium hypochlorite (NaOCl) was dissolved in a solution buffered to pH = 6.20 . find the ratio…

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Q: Using the periodic table to locate each element, write the electron configuration of (a) Ru; (b) Cu;…

A: (a) Ru : Period = 5 Group = 8 Atomic number = 44 Electronic configuration = [Kr] 4d7 5s1 (b) Cu :…

Q: Discuss the functions and regulation of sodium, chloride, potassium, bicarbonate, calcium,…

A: Given ions sodium, chloride, potassium, bicarbonate, calcium, phosphate, and magnesium  are present…

Q: You have a solution that contains Ca2+ ions and another that contains Na+ ions. How would adding a…

A: Let solution A contains Ca2+ ions Solution B contains Na+ ions Adding a solution containing…

Q: what is chemical formula created when calcium (20) bonds with the polyatomic ion hydrogen phosphate.

A: A chemical formula is a representation of a molecule that uses chemical symbols to indicate the…

Q: 2) What is one of the major hazards associated with potassium dichromate?

A: Potassium dichromate molecular formula is K2Cr2O7.

Q: The number is d electrons in Ag

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Q: Account for (explain the reason for) the difference in acidity. HO-AS-OH HO-As-OH OH pKa= 2.12…

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Q: Why is titanium metal called as strategic metal? Mention two of its properties which makes it so…

A: Titanium is called strategic metal because it is used for making certain war equipments.   The…

Q: Name two elements that occur in the free metallic state in nature.

A: The metals which are least reactive in nature can be found in free metallic state. Their reactivity…

Q: Electrons in a strong magnet....

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Q: Fluorescent compound

A: Answer: the reaction product of thiochrome  formation is fluorescent compound.

Q: H,O,(aq) 21(aq) + 2H*(аq) > 2H,0 () + , (aq) +

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Q: what is the formula for determining the chemical formula created when gallium (31) bonds with sulfur…

A: Gallium(III) sulfide, Ga2S3, is a compound of sulphura gallium, that is a semiconductor that has…

Q: Sequestering agent for Benedict’s Solution:

A: In this we have to know about sequestering agent for Benedict's solution and salts of these alkaline…

Q: What color is Iron Sulfate and what color is iron bicarbonate?

A: Color of iron sulfate is green.

Q: Which hazard is not associated with the sodium fusion operation?     Open flame     Hot…

A: Answer  Hazard not associated with sodium fusion operation is…

Q: what is the chemical formula for disodium ammonium phosphate ?

A: SOLUTION Valency of sodium (Na) is +1. Valency of ammonium ion (NH4 + ) is +1. Valency of phosphate…

Q: 1. Demonstrate any 5 important applications of Calcium and the advantages of each application? 2.…

A: 1. Answer - According to the question - Humans need calcium to build and maintain strong bones, and…

Q: the chemical formula for iodine fuming to find finger prints

A: Iodine dissolves easily in fats; fingerprints are composed of fats only. The small amount of fat…

Q: which one of the following is an ionization technique? MALDI or ESI

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Q: Explain why water is added to magnesium oxide? A. Water will increase the yield of magnesium oxide…

A: The reaction is basically a reaction to produce MgO.

Q: Is Gd considered a F-block element, main group element, transition metal, or halogen? main group…

A: Gd is an atomic symbol of the Gadolinium element and has an atomic number of 64. Gadolinium is a…

Q: Does potassium dichromate oxidizes melted phenol? Please write the equation and identify the color…

A: Potassium dichromate: Its molecular formula is K2Cr2O7. It is an red-orange colored crystalline…

Q: How is Compound 24 . manufactured?

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Q: in significantly increased activity. What is a reasonable explanation for the increase in activity…

A: Whem methyl group introduced then conformation sing act as blocker and it prevent to pyridine to…

Q: The number of reactive specie formed when potassium iodate was reduced to potassium iodide A. 1 B. 2…

A: Number of products formed will be equivalent to number of reactive species produced on reduction of…

Q: determine whether the following elements are paramagnetic or diamagnetic: - Rhuthenium -Rubidium…

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Q: what evidence is there that the copper reduced silver ions? 2. Silver nitrate and copper 1Cu(s) +…

A: Oxidation is loss of electrons and Reduction is gain of electrons.

Q: Explain the relative activity of a metal.

A: Metals have electropositive nature and are placed on the left corner of the periodic table. On…

Q: how do iron-54 and iron-56 differ from each other?

A: Iron-54 means its mass number is 54. The atomic number of iron (Fe) is 26. The mass number is the…

Q: determine the chemical formula created when calcium (20) bonds with the polyatomic ion hydrogen…

A: To form an ionic compound cation and anion transfer their charge Ca +2 and HPO4-2 they will form…

Q: From where is iodine obtained?

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Q: determine the chemical formula created when potassium (19) bonds with the polyatomic ion phosphate.

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Q: Iron is one of the biologically necessary metals.  Name two biochemical functions that it serves.

A: A chemical reaction is symbolic representation of the conversion of substances to new substances. In…

Q: Predict the chemical formula for the ionic compound formed by Hg₂²⁺ and CO₃²⁻

A: The type of chemical bonding that consists of the electrostatic interaction of oppositely charged…

Q: A given solution absorbs green light very strongly. What color does the solution appear? violet…

A: A given solution absorbs green light very strongly.

Q: In the sodium metal test, what is the purpose of adding anhydrous calcium sulfate?

A: Drying agents (also called desiccants) come in various forms and have found widespread use in foods,…

Q: is Chromium more similar to iron or tongsten and why

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Q: Which of the following statements is true about actinoides are all synthetic elements O include…

A: Actinoids series consists of 15 metallic chemical elements with atomic number from 89 to 103.

Q: QUESTION (7) Write brief notes on the three methods of hydrogen storage a. Solid b. Liquid c. Gas

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Q: All of these following elements or compounds are chemically unreactive, except: Krypton O Carbon…

A: Given we know about the rectivety of the atoms All of these following elements or compounds are…

Q: The pKa of HClO2 is 7.6. Calculate the pH of a 0.50 M solution of HClO2

A: we need to find out the pH of 0.50 M of HClO2 solution. HClO2 + H2O → ClO2- + H3O+

Q: what is the chemical formula created when gallium (31) bonds with sulfur (16)

A: The given elements are gallium and sulfur. The atomic number of gallium is 31 and sulfur is 16.

Q: The following reaction is used for the analytical determination of uranium in acidic solution:  UO2+…

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Q: What substance is present if the iodine test gives a red color change?

A: The iodine test is performed to check for presence of starch in carbohydrates. Since iodine is not…