What is the mass of K2CrO4 necessary to prepare 10 mL of a 5% (w/v) indicator solution?

Q: Which of the following statement is correct about a solution contains 0.4 M NaH2PO4 and 0.2 M H3PO4?

A: H3PO4 and NaH2PO4 are acid-conjugate pair  So, applying Henderson hasselbalech equation we get

Q: 2. 48 g of CH3OH dissolved in 200 g of H2O

A: 2. 48 g of CH3OH dissolved in 200 g of H2OHere we have to calculate the molality, freezing point…

Q: In the video, when manganese dioxide is added to the H202 solution, what forms bubbles?

A: When manganese dioxide is added in hydrogen peroxide decomposition reaction occur and it decomposed…

Q: At the freezing point of water 10 °C2, Kw = 1.2 * 10-15. Calculate 3H+4 and 3OH-4 for a neutral…

A: Given, The freezing point of water =0 °C Kw = 1.2×10-15

Q: When NH4CI is added to water, the resulting solution feels cool to the touch. Which best describes…

A: At a particular temeprature the amount of heat energy released (or) obserbed when 1 mole of solute…

Q: What happens to the freezing point of H2O when salt is dissolved?

A: Freezing point : The point at which  water becomes ice.

Q: In an experiment, Milabel were tasked to prepare 200.00 mL of 3.5 M solution from a concentrated…

A:

Q: Number of moles of sodium sulfate dissolved in 2 L of a 0.12 M sulfate, Na2SO4solution

A: Given :- molarity of Na2SO4 solution = 0.12 M                Volume of solution = 2 L  To calculate…

Q: 5-In 6% acetic acid solution with a density of 1.12 g / cm3, what percentage of acetic acid ionizes?…

A: Acetic acid is a weak acid, so it does not dissociates completely in aqueous solution.  This we can…

Q: Calculate the mass of Na2CO3.aH2O required to prepare a 250 ml of a 0,05 M solution assuming that…

A: To prepare a standard solution first determine the number of moles of solute needed for one liter of…

Q: How much water must you add to 25 mL of 3.0 M NH3 to dilute it to 0.60M?

A: Since we are just adding water  Hence moles of NH3 in initial solution should be equal to moles of…

Q: 1. How many grams of benzoic acid (C,H.COOH) are contained in a 75 ml solution at 0.21 M…

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Q: In an aqueous solution at 25°C, if [H₃O⁺] = 7.6 × 10⁻⁴ M, then [OH⁻] is:

A:

Q: In an aqueous solution at 25°C, if [H₃O⁺] = 6.3 × 10⁻⁴ M, then [OH⁻] is:

A: Using ionic product of water, concentration of hydroxyl ion can be determined from the hydronium ion…

Q: Which of the following solutions would resulting in neutral solution after mixing with 200ml of…

A: Answer is d) 160 ml of 0.50 M NaOH

Q: (a) What is the charge density of an ion, and what two prop-erties of an ion affect it?(b) Arrange…

A: Ions are formed from an atom, when the number of protons and number of electrons are unequal. The…

Q: 11) How much 0.05 M HCl solution can be made by diluting 250 mL of 10 M HCI?

A: Dilution decreases the concentration of the solution that is same moles are distributed over the…

Q: What is the freezing point of an aqueous 1.00 m NaCl solution? (Kf = -1.86 C/m) (Assume complete…

A: Given , molality of NaCl =1.00 m          Molal freezing point constant or cryoscopic constant i.e…

Q: A concentrated ammonia solution is 17.4 M ammonium hydroxide (NH4OH). How do you prepare a 250 mL of…

A: Given: Concentration of concentrated ammonia solution = 17.4 M Concentration of diluted ammonia…

Q: What is the final volume of a solution made by mixing 2.50ml of 6.00M HCI to make a 0.150M solution

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Q: Calculate the wt of oxalic acid required to prepare 1,000mL of 0.2 N of the solution.

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Q: Why are KMnO4 solutions filtered before they are standardized?

A: When a solution is made from the accurate and known quantity of the compound then the resultant…

Q: What is the percent (m/v) of a 200 mL saturated solution of ammonia chloride (NH4Cl) at 70oC?

A: The concentration of a substance can be measured in terms of mass by volume percentage. This…

Q: A solution is composed of 30 mL of 2.5 M H2SO4 and 25 mL of 6.4 N KOH. What is the milliequivalences…

A: Given, Concentration of H2SO4 is ----- 2.5M Volume of H2SO4 is -----30mL. How many milliequivalents…

Q: A solution of ammonium sulfate was prepared by dissolving 55.44g of (NH4)2SO4 in enough water to…

A: Given,Mass of (NH4)2SO4 = 55.44 gVolume of solution = 2.00 L The number of moles of (NH4)2SO4 can be…

Q: Kr ions 12.3mL(1.36mol) In. KBr solution

A: Given: The volume of the solution of KBr=12.3mL=0.0123 L. The number of moles of K+ ions=1.36 moles.…

Q: 4.62mL of  .1510mL NaOH was needed to neutraliz 50.mL of H2SO4 solution. What is the concentration…

A: In the given question we have to calculate the concentration of original sulphuric acid solution.…

Q: At what temperature will 40g NaCl dissolve in 100g water?

A: Using the solubility curve of NaCl with temperature, for 40g of NaCl to be dissolved  in 100g of…

Q: Substance/ Solution pH [H*] [OH] pOH 1 vinegar 4 2 soap solution 7.5 3 calamansi juice 3

A: Note : As per our guidelines we are supposed to answer first 3 parts .Please resubmit the other…

Q: prepare 2N solution in 250 ml volumetric flask from 5N of hci stock solution.

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Q: What is the molar concentration (in mM) of your solution if you…

A: Here we have to determine molar concentration of NaOH solution if 33 gram of NaOH dissolved in 500ml…

Q: [OH−

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Q: The pHpH of a solution of Ba(OH)2Ba(OH)2 is 10.66 at 25∘C.25∘C. What is the hydroxide ion…

A: Stoichiometry is mainly based on the calculation of moles and molarity. These two values are used to…

Q: What is the % (m/m) of a salt solution prepared by mixing 25.0 g of NaCl with 125 g of water?

A: Recall the expression of mass percent     % m/m=mass of solutein gmass of solutionin g×100 %Given…

Q: Provide instructions to prepare 50 mL of a K2SO4 saturated solution at 25 ◦C

A: A saturated solution is the one in which the maximum amount of solute that is soluble in the solvent…

Q: 4. Amount of HCl in grams in preparing 25% 2 liters of solution

A: In this question, we want to determine the amount of HCl in grams unit in 25% of 2L solution.  You…

Q: 16. Calculate the mass of NaOH in grams required to prepare a 1900 ml solution with a concentration…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: What is the molarity of a NaOH solution if 0.2420g of oxalic acid dihydrate (H2C2O4•2H2O) required…

A: We'll answer the second question as exact information is not specified in first question.please…

Q: What concentration is obtained when 20mL of water is added to 80mL of 1.5M sulfuric acid?

A: Initially when there is no volume of water added at that time the number of moles present in…

Q: Give a clear explanation handwritten answer of each compound....

A: Solubility Product is the dynamic equilibrium that exists when a chemical compound in solid state is…

Q: Nicotinic acid (Ka= 1.4x10-5), is another name for niacin, an important member of the vitamin B…

A: Acid dissociation; For an acid HA, HA+H2O↔H3O++A-Ka=[H3O+] [A-][HA]

Q: How many equivalents are in 3.1 g of the diprotic acid H2S? The molar mass of H2S is 34.0 g.

A: The acids are generally classified into monoprotic, diprotic , triprotic etc.. based on the presence…

Q: Prepare 250mL of a 0.75M solution of phosphoric acid from 75.0% phosphoric acid that is pure. The…

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Q: In an aqueous solution at 25°C, if [H₃O⁺] = 7.5 × 10⁻⁴ M, then [OH⁻] i

A: For the acid-base reaction, a common solvent that is preferred is water. This is due to its…

Q: In an aqueous solution at 25°C, if [H₃O⁺] = 8.6 × 10⁻⁴ M, then [OH⁻] is:

A: The question is based on the concept of PH and pOH calculations. pH is defined as negative…

Q: What type of solution has a hydroxide ion concentration, [OH-], that is greater than a hydronium ion…

A: Acidic solutions are those which have pH < 7 and basic solutions are those which have pH > 7

Q: A solution of 0.1 mol C6H1206, NaCl and Na3P04 each in 1000 grams of water, brought to a boil. (a).…

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Q: 8. When cyanide poisoning intravenously administered 2% sodium nitrite solution (p = 1.011 g/mL).…

A: Molar concentration is the representation of the number of moles of solute in a solution. In other…

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.