A student is asked to determine the molarity of a strong base by titrating it with 0.250 M solution of H2SO4. The students is in
structed to pipet a 20.0 mL portion of the strong base solution into a conical flask, to add two drops of an indicator that changes at pH = 7, and to dispense the standard H2SO4 solution from a buret until the solution undergoes a permanent color change. The initial buret reading is 5.00 mL and the final reading is 30.00 mL at the equivalence point.Which procedural error will result in a strong base molarity that is too high?Using an indicator that changes at pH = 5 rather than at pH = 7Using a buret with a tip filled with air rather than the H2SO4 solutionUsing 4 drops of indicator rather than the recommended 2 dropsUsing a conical flask that contains several drops of H2O
Population change is governed by the balance between birth rates and death rates. If the birth rate stays the same and the death rate decreases, then population numbers will grow. If the birth rate increases and the death rate stays the same, then population will also grow.
