a student weighs out 0.1521g of Na2CO3 and dissolves it in 55.00mL of water. How many moles of HCl will be needed to reach the methyl orange equivalence point of the titration? (formula weight of Na2CO3 = 105.99g/mole; formula weight of HCl = 36.46g/mole)
a student weighs out 0.1521g of Na2CO3 and dissolves it in 55.00mL of water. How many...
In Experiment 6, a student weighs out 0.1521g of Na2CO3 and dissolves it in 55.00mL of water. How many moles of HCl will be needed to reach the methyl orange equivalence point of the titration? (formula weight of Na2CO3 = 105.99g/mole; formula weight of HCl = 36.46g/mole) a) 0.00144 moles b) 0.00287 moles c) 0.0287 moles d) 0.0574 moles e) none of the above
A student is asked to analyze a Na2CO3 sample by titrating it with HCl. He/she weighs out 1.000 g of the unknown, dissolves it in 50 ml of deionized water, and titrates it with 0.100 M HCl. The final equivalence point (i.e., the second one for methyl orange indicator) occurs after the 24.00 mL of HCl have been added. What is the weight of Na2CO3 in the unknown? (Formula weights: Na2CO3 = 105.99 g/mole; HCl = 36.46 g/mole) A) 0.013...
A student weighs out 0.605g of KHP, dissolves it in 50ml of water and titrates it with NaOH, using phenolphalein to determine the end point. If the initial buret reading for the NaOH is 3.50ml and the final buret reading is 27.32ml, What is the concentration of the NaOH solution (in M).
How many mL of 0.1 M HCl are required to reach the 2nd equivalence point of the titration of 0.18 g dried Na2CO3?
A chemistry student needs to standardize a fresh solution of sodium hydroxide. She carefully weighs out 201.mg of oxalic acid H2C2O4 , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in 250.mL of distilled water. The student then titrates the oxalic acid solution with her sodium hydroxide solution. When the titration reaches the equivalence point, the student finds she has used 63.0mL of sodium hydroxide solution. Calculate the molarity of the student's sodium hydroxide...
Question 10 Question; Suppose you believe your unknown compound is Na2CO3, and you also prepare 20 mL of a 0.1 mol/L solution of it. Using a 0.2 mol/L HCl solution as the titrant, what volume of HCl (in mL) is needed to reach the equivalence point when methyl orange turns red? Hint: . Write the chemical reaction with Na2CO3 and HCl as reactant first, and then balance the chemical reaction. . The conceptual plan above still helps the flow of...
Determining the volume of base needed to trate a given mass... A chestry student weighs out 0.0171 g of formic acid (HCHO,) into a 250 ml. volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.0900 M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits. XS ? Check
A student weighs out a 0.3708 g sample of KHP. How many moles of KHP is in that sample? The molar mass is 204.2212 g/mol.
The student dissolved 2.050 grams of acid in 50 mL of distilled water. He then titrated the unknown acid with a standardized NaOH solution. Unfortunately, the student over shot the end point and had to back titrate the solution with 2.17 mL of 0.98861 M HCl. Once the final end point was determined, the student had added a total of 29.15 mL of a 1.0324 M NaOH solution. A) How many moles of OH- were used to reach the end...
The student dissolved 2.050 grams of acid in 50 mL of distilled water. He then titrated the unknown acid with a standardized NaOH solution. Unfortunately, the student over shot the end point and had to back titrate the solution with 2.17 mL of 0.98861 M HCl. Once the final end point was determined, the student had added a total of 29.15 mL of a 1.0324 M NaOH solution. A) How many moles of OH- were used to reach the end...