The Burke Museum at the UW is analyzing a dinosaur bone sample for the amount of calcium it contains.  The bone sample was dissolved in hydrochloric acid, giving 50.0 mL of solution containing calcium chloride.  To precipitate the calcium ion from the resulting solution, an excess of potassium oxalate was added.  The resulting precipitate of calcium oxalate, CaC2O4, weighed 1.437 g. What was the molarity of CaCl2 in the solution?

Q: In a titration experiment, a chemist finds that a 25.0 mL solution of aq. HCl requires 51.3 mL of…

A: n-factor of HCl, nHCl = 1 Molarity of HCl, MHCl = ? Volume of HCl, VHCl = 25 mL = 0.025 L n-factor…

Q: total acidity in water samples can be determined by neutralization with standard sodium hydroxide…

A:

Q: Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical…

A: Given,The products of the reaction: Ca(ClO)2 (aq) + 2 H2O (l)

Q: If 60.13g of Nb(s) are added to 125.0ml of a 5.96mL of a 5.96 M solution of HClO4(aq), what is the…

A: Given that -  Mass of Nb(s) = 60.13 g  Volume of HClO4 Solution = 125.0 mL  Molarity of HClO4…

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A: Molarity is defined as the number of moles of solute dissolved per liter of the solution. Molarity,…

Q: o analyze the alcohol content of a certain wine, a chemist needs 0.57 L of an aqueous 0.367 M K 2Cr…

A: Solution - According to the question - Given - Volume of K2Cr2O7 solution = 0.57 L Molarity…

Q: 250.0 mg of copper(II) sulfate pentahydrate (CuSO4•5H2O, 249.69 g/mol) was dissolved in water to…

A: Since mass of CuSO4•5H2O used = 250 mg = 0.25 g              (since 1 g = 1000 mg) Hence moles of…

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Q: The solubility of calcium fluoride (CaF2) in water is 0.132 g per 100 ml of aqueous solution.…

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Q: A 7.92 mL sample of MgCl2 aqueous solution was diluted to a volume of 27.3 mL. If the chloride ion…

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Q: ou dissolve 4.12 g of potassium formate (KCHO2) in sample water in the laboratory to make 322.00 mL…

A:

Q: A 10.00 mL sample of 0.200 MHCl(aq) is diluted to a total volume of 100 mL. Calculate the molarity…

A:

Q: The concentration of citric acid (H3C6H5O7) in citric fruits ranges from 0.005 M to 0.30 M. Consider…

A: Since concentration of citric acid = moles of citric acid / volume of solution in L  Hence moles of…

Q: Suppose 0.696 g of lead(II) acetate is dissolved in 150. mL of a 27.0 m Maqueous solution of…

A: Given that : Mass of lead (II) acetate = 0.696 g The volume of ammonium sulfate solution = 150 mL…

Q: A titration is performed to determine the amount of sulfuric acid, H2SO4, in a 6.5 mL sample taken…

A: Answer:Molar concentration of a solute in a solution is always equal to the ratio of number of moles…

Q: A solution contains 0.0610 gg of oxalic acid, H2C2O4⋅2H2OH2C2O4⋅2H2O,in 250. mL. What is the…

A:

Q: What volume of a 0.250 M AgNO3 (aq) solution Contains 2.34g of silver nitrate?

A:

Q: A student uses 1.05 g of a tablet containing Carbonic Acid dissolved in 0.05 L distilled water. The…

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Q: A student analyzes a sample of rock that contains the element calcium (Ca). In the student's…

A: Given that,182.2 mg of the rock produces 120.7 mg of CaC2O4 on treatment of Na2C2O4 We have to find…

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Q: Suppose that a lake was contaminated with nitric acid (HNO3), and another chemical was needed to…

A: Given that : Suppose that a lake was contaminated with nitric acid (HNO3), and another chemical was…

Q: A solution contains 32.929 mL of 1.436 M Ca(OH)2 (aq). How many moles of hydroxide ion are present…

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Q: How many grams of anhydrous copper(II) nitrate, Cu(NO3)2, are needed to prepare 500.0 mL of a 0.0750…

A:

Q: 30.00 mL of nitric acid (HNO3) with an unknown concentration was placed into an Erlenmeyer flask.…

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A: The objective of this question is to determine the mass percentage of  in the original mixture.

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A:

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A:

Q: The concentration of SO42– ions in a 45.0 mL sample of seawater is determined by adding a solution…

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Q: A titration is performed to determine the amount of sulfuric acid, H2SO4, in a 6.5 mL sample taken…

A: Information of question

Q: What mass of Na2SO4 is required to precipitate all of the lead cations found in an 18.5 ml sample of…

A:

Q: How many grams of NO 3 - ion are in the  final solution?

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Q: 30.00 mL of nitric acid (HNO3) with an unknown concentration was placed into an Erlenmeyer flask.…

A: Given data,Volume of nitric acid=30.0mL=0.030LMolarity of calcium hydroxide=0.1498MVolume of calcium…

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.