QUES A certain compound was known to contain calcium and chlorine. A sample that weighed 2.78g was dissolved in water, and excess sodium oxalate solution was added to precipitate all the calcium as calcium oxalate, CaC204. The equation for this reaction was: Ca* (aq)+ C,0, (ag)→ CaC,0,(s) The precipitate was then collected by filtration and heated strongly so that calcium oxide, CaO, formed. The calcium oxide was found to have a mass of 1.40 g. What was the empirical formula of the compound?

Q: O A chemical engineer determines the mass percent of iron in an ore sample by converting Fe to Fe in…

A: The balanced reaction taking place is given as, Given : Concentration of KMnO4 = 0.03190 M Volume…

Q: A solution of NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO3)₂(aq), until no further…

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Q: A 350. mL solution of 0.150 M HNO3(aq) is mixed with a solution of 230. mL of 0.240 M HCl(aq). How…

A: Given data, 350 mL of 0.150 M HNO3 230 mL of 0.240 M HCl (aq) solution

Q: To measure the amount of iron in a certain type of iron ore, an analytical chemist dissolves a 41.00…

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Q: Solution A is 0.2400 M Ca(NO3)2(aq). Solution A is diluted by a factor of 3 to form Solution B.…

A: The reaction taking place is  3As2O3 + 4NO3- + 7H2O + 4H+ → 6H3AsO4 + 4NO Balancing explanation :…

Q: How many grams of Pb(IO3)2(s) are precipitated when 27.0 mL of 3.00 M Pb(NO3)2(aq) are mixed with…

A: The balanced chemical equation is given below.

Q: In the gravimetric analysis of chloride by precipitation, a 0.4000 g impure sample of sodium…

A: Gravimetric analysis is a quantitative analytical method used to determine the amount of a substance…

Q: A 0.8761 g sample of iron ore is dissolved in acid, the iron is oxidized to the +3 state and then…

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Q: 4. Consider the mixing of 20.5 mL of 0.500 M NaOH (aq) with 15.2 mL of 0.223 M Ba(NO3)2 (aq). (a)…

A: Given data is: Volume of NaOH= 20.5 mL Concentration of NaOH = 0.500 M Volume of NaOH= 15.2 mL…

Q: a student is given 50.0 mL of a solution of Na2CO3 of unknown concentration.   to determine the…

A: Answer:- This question is answered by using the simple concept of writing the net ionc equation anf…

Q: 1.0 L of 0.75 M solutions of AgNO3 and BaCl2 are mixed. The following reaction occurs:…

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Q: A sample of solid Mg(OH)2 was stirred in water at a certain temperature until the solution contained…

A: HClO4 is a strong acid, it reacts with magnesium hydroxide Mg(OH)2 , this is an acid base reaction.…

Q: The concentration of a certain sodium hydroxide solution was determined by using the solution to…

A: Given: Volume of NaOH neutralized = 48.82 mL = 0.04882 L                           (Since 1 L = 1000…

Q: The concentration of SO42– ions in a 60.0 mL sample of seawater is determined by adding a solution…

A: Volume of sea water sample is 60 mL Mass of BaSO4 is 0.448 g Concentration of sulfate in mmol/L =?

Q: Fe(I) can be precipitated from a slightly basic aqueous solution by bubbling oxygen through the…

A: Consider the given balanced reaction as; Reaction:      4 FeOH+ aq + 4 OH- aq + O2 g + 2 H2O l → 4…

Q: You are asked to determine the percentage of the components of a mixture containing sodium iodide,…

A: (a) Mass of NaI recovered = 0.95g NaI Total mass of mixture = 4.82 g Thus, percent NaI in sample =…

Q: Write the balanced molecular equation for the reaction. Write the net ionic equation for the…

A: number of moles = mass/molar mass  molar mass of AgCl is 143.32 g/mol     Since, you have posted a…

Q: The concentration of a certain sodium hydroxide solution was determined by using the solution to…

A:

Q: Solution A is 0.2400 M Ca(NO)2(aq). Solution A is diluted by a factor of 3 to form Solution B.…

A: The reaction taking place is  3As2O3 + 4NO3- + 7H2O + 4H+ → 6H3AsO4 + 4NO Balancing explanation :…

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.