225 Please print; last name irst Locker Number Date - PRELIMINARY EXERCISES Expe
ID: 559476 • Letter: 2
Question
225 Please print; last name irst Locker Number Date - PRELIMINARY EXERCISES Experiment 16 Acid-Base Titrations e the following terms associated with titrations: a. standard solution he B0 S since c. indicator Write the balanced formula equation and the net ionic equation for the reaction of sodi hydroxide with hydrochloric acid. Formula equation Net Ionic equation: What is the molarity of a solution prepared by deionized water to obtain 5 00.0 mL of solution? The molar mass of NaOH is 40.0 Molarity = What is the color of phenolphthalein indicator in: b. basic solution a. acidic solution l aauring that 5.00 mL o
Explanation / Answer
Standard solution: A solution which is used to determine the concentration of a unknown sample in titration. Concentration of this standard solution is already known and used as a titrant in titration.
End point : It is a point at which nuber of equivalent of acid is equal to number of equivalent of base. at this point PH of solution chages suddenly.
Indicator : It is a component which is used in titration to find end point of titration. when PH changes suddenly at end point, color of indicator also change, which indicates that the end point of titration has reached.
formula equation : NaOH + HCl --------> NaCl + H2O
ionic equation : H+ + OH- ----> H2O
molarity od solution = moles of NaOH / Volume of solution (In litre)
moles of NaOH = 2.24 / 40 = 0.056
volume of solution = 500/1000 = 0.5 litre
ao Molarity = 0.056 / 0.5 = 0.112
color of phenolphthalein in acidic solution = colourless
color of phenolphthalein in basic solution = pink
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