A solution was prepared by dissolving 0.403 g of potassium dichromate, K2Cr2O7 (MM=294.18 g/mol) in 13.49 mL of total solution. Calculate the molar concentration (mol/L) of potassium ion (MM=39.098 g/mol) in the solution. K2Cr2O7 ->2K+ +Cr2O7 -2 Provide your answer to the 4 decimal places and without units.

Q: A chemistry student needs to standardize a fresh solution of sodium hydroxide. She carefully weighs…

A: The reaction of oxalic acid and NaOH is: H2C2O4 +2NaOH →Na2C2O4 + 2H2O

Q: A 400 mg sample of a 600 mg tablet is dissolved in 60 mL of 0.3 M H2SO4 and combined with 2 g of…

A:

Q: Consider the reaction of 75.0 mL of 0.350 M CSHSN (Kb = 1.7 x 10) with 100.0 mL of 0.419 M HCI.…

A: In the given reaction,  75.0 mL of 0.350 M C5H5N reacts with 100.0 mL of 0.419 M HCI.  Kb = 1.7 x…

Q: on, how many mL of 0.200M NaOH solutio O FO OM ICI

A:

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Q: An unknown volume of 2.50M H2SO, was diluted to 50 ml using water. The diluted solution was titrated…

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Q: A solution is prepared by dissolving 10.8 g of (NH4)3PO4 in enough water to make 100.0 mL of…

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Q: A solution contains 8.86x10-3 M ammonium carbonate and 5.11x10-3 M sodium fluoride. Solid lead…

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Q: A buffer is prepared with a concentration of 0.20 M acetic acid and 0.20 M sodium acetate. The…

A: Reaction: CH3COOH + H2O ⇋ CH3COO- + H3O+ Ka=1.8×10-5

Q: The ascorbic acid, C6H806 (176.124 g/mmol) content of a bottle of peach juice containing 2.50 L was…

A: I have attached a detailed solution for the question in the following steps:

Q: The metathesis reaction between sodium carbonate adn iron (III) nitrate is shown below 3NA2CO3 (aq)…

A: Given - Reaction  3Na2CO3 (aq) + 2Fe(NO3)3 (aq) ----> Fe2(Co3)3 (s) + 6 NaNO3 (aq) 0.300 M…

Q: A solution containing KCI (74.551 g/mol) is analyzed by the Mohr Method. A 0.8312-g sample is…

A: The volume of AgNO3 required by the sample is 27.99 mL The volume of titrant required to reach the…

Q: How much 9.00 M HCl (in mL) would be required to decompose the excess Mg present?

A: Step : 1           How much 9.00 M HCl (in mL) would be required to decompose the excess Mg present?

Q: Calculate the molar concentration of Ag+ ion in a solution that has a pAg of 5.673.

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Q: 1. Calculate the volume of 3.0 M H2SO4 required to neutralize the total 3 ml of 4 % borax (by mass)…

A: 1.

Q: 15. The alcohol content in a 10.0 g sample of blood from a driver required 4.23 mL of 0.07654 M…

A: The alcohol content in a 10.0 g sample of blood from a driver required 4.23 mL of 0.07654 M K2Cr2O7…

Q: Analysis shows the 15.0 L of seawater simulant contains a mercury (II) ion concentration of 3 X 10-4…

A: The number of moles of Hg22+ ion in the 15.0 L solution is; nHg22-=15.0 L×3×10-4 M=45.0×10-4 mol

Q: A 0.249 M sodium hydroxide solution required 25.00 mL to titrate 10.0 mL of an unknown concentration…

A:

Q: Consider the reaction: Pb(NO3)2(aq) 2NACI(aq) – PBCI2(6) + 2NaNO3(aq) What volume (in mL) of 0.200 M…

A: The volume of sodium chloride = 40 mL  Concentration of sodium chloride = 0.218 M Moles of NaCl =…

Q: 200.0 mL of a 0.240 M solution of ammonia (NH3) is mixed with 200.0  mL of a 0.240 M solution of…

A: The neutralization reaction is given below. NH3 (aq) + HCl (aq) → NH4Cl (aq)

Q: As you are studying for finals, you calculate the concentration of caffeine in an energy drink and…

A: Mass of caffeine = 289 mg = 0.289 g  Molar mass of caffeine = 194.19 g/mol  Moles of caffeine =…

Q: Consider a 0.586 M aqueous solution of barium hydroxide, Вa(ОН)2Ba(ОН)2 (аq). How many grams of…

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Q: A 30.0030.00 mL Ba(OH)2Ba(OH)2 solution of unknown concentration was neutralized by the addition of…

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Q: the molarity of the NaOH solution used

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Q: 4. Calculate the mass of KHP needed to react completely with 25 mL of a 0.10 M NAOH solution.…

A: The number of moles of a substance is the SI unit for the amount of substance present in the…

Q: A technician would like to standardize an unknown Ca(OH)2 solution. It takes 33.71 mL of a 0.155 M…

A: Given: The volume of Ca(OH)2 is 25.00 mL. The volume of HCl is 33.71 mL. The molarity of HCl is…

Q: What is the mass of sodium oxalate (Na2C2O4, MM = 134,00 g/mol), in mg, should be taken so that in…

A:

Q: 3NaOH(aq) + FeCl3 3NaCl(aq) + Fe(OH)3(s) A. Calculate the volume of 0.200M FeCl3 solution needed to…

A: The balanced reaction taking place is given as, => 3 NaOH (aq) + FeCl3 (aq) ------> 3 NaCl…

Q: What is the nickel ion concentration in a solution prepared by mixing 381 mL of 0.395 M nickel…

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Q: A student titrates an unknown amount of potassium hydrogen phthalate (KHC3H₂O4, often abbreviated…

A: Given,  Volume of NaOH = 22.11 mL  Molarity of NaOH = 0.1400 M  Molar mass of KHC8H4O4 = 204.22…

Q: 14. a 20.00 mL sample of aqueous oxalic acid, H2 C2 O4 , was titrated with a 0.09113 M solution of…

A: Given: Oxalic acid Volume = 20.00mL Molarity of oxalic acid = ? Molarity of potassium permanganate =…

Q: An organic acid (HA) in a sample that weighs 0.3996 grams was incorporated in water to form a…

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Q: A chemistry student needs to standardize a fresh solution of sodium hydroxide. She carefully weighs…

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Q: What is the pH at the equivalence point?

A: We have to find the pH of solution

Q: If 50.0 ml of 1.00 M MgCl2 is added to 50.0 ml of 1.00M NaOH, solid Mg(OH)2 forms according to the…

A: Given balanced equation:   MgCl2 (aq)   +  2 NaOH(aq)  -->   Mg(OH)2( s)   +  2 NaCl (aq)  We…

Q: Suppose you want to dissolve 1.0 gram of FeS (M=87.9 g/mol) in 200 mL of water. How much NaCN…

A: m = 1.0 gV = 200 mL = 0.2 LM = 49.0 g/mol

Q: Consider a 0.586 M aqueous solution of barium hydroxide, Bа(ОН)2Ba(ОН)2 (ад). How many grams of…

A:

Q: Calculate the concentration of IO3 in a 1.19 mM Pb(NO3)₂ solution saturated with Pb(IO3)2. The Ksp…

A: The reaction is represented as follows: Pb(NO3)2 → Pb2++2NO3- Concentration of Pb(NO3)2 = 1.19 mM =…

Q: Sodium carbonate, NaCO3 (formula weight = 106 g/mol) is sometimes used to standardize acid…

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Q: What is the cobalt(II) ion concentration in a solution prepared by mixing 449 mL of 0.358 M…

A: The balanced net ionic equation is  Co+2 (aq) + 2 OH– (aq) ---------> Co(OH)2 (s) Number of moles…

Q: Potassium permanganate solutions may be standardized by titrating against primary standard sodium…

A: Mass of Na2C2O4 = 0.2168g  Molar mass of Na2C2O4 = 134g/mol  Moles of Na2C2O4 = 0.2168g÷134g/mol =…

Q: A 2.125 g sample of a solid mixture containing only potassium carbonate (MM = 138.2058 g/mol) and…

A: Given: The weight of the total mixture of potassium carbonate and potassium bicarbonate is 2.125g.…

Q: CH H HOW . H H CH(CH,l

A: In most stable conformation of cyclohexane bulkiest group must be in equatorial position. Draw the…

Q: A chemistry student needs to standardize a fresh solution of sodium hydroxide. He carefully weighs…

A: Here we are required to find the Molarity of sodium hydroxide solution required for standardization…

Q: Bleach is a solution of NaOCl. A 10.00 mL sample of bleach was diluted with 25.00 mLs of water and…

A: To calculate the molarity of the bleach solution (NaOCl), you can use the balanced chemical equation…

Q: that contains 0.015 M Ni2+ ions and 0.015 M Ca2+ ions. You slowly add Na2CO3 to the solution. What…

A: Solubility equilibrium is a type of dynamic equilibrium that exists when a chemical compound in the…

Q: A 50 ml sample taken from a vinegar sample was diluted to 500 ml with distilled water. The 25.0 mL…

A:

Q: A solution of 0.10 M KOH is used to totally neutralize 50.0 mL of a H3PO4 solution in the balanced…

A: Given, Molarity of KOH solution = 0.10 M Volume of KOH solution = 100.0ml Volume of H3PO4 solution =…

Q: The density of octane, C8H18C8⁢H18, is 0.703 g/mL0.703 g/mL. Calculate the number of moles of octane…

A: Given Data :  1.density of octane = 0.703 g/mL  2. Volume = 49.1 mL  Molar mass of octane = 114.23…