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
In Experiment 6, a student weighs out 0.1521g of Na2CO3 and dissolves it in 55.00mL of...
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 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).
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...
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