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Home/ Questions/The flask shown here contains 10.0 mL of HCI and a few drops of phenolphthalein indicator.
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Asked: April 11, 20222022-04-11T19:38:03+00:00 2022-04-11T19:38:03+00:00In: Chemistry

The flask shown here contains 10.0 mL of HCI and a few drops of phenolphthalein indicator.

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The flask shown here contains 10.0 mL of HCI and a few drops of phenolphthalein indicator....

The flask shown here contains 10.0 mL of HCI and a few drops of phenolphthalein indicator. The buret contains 0.170 M.
a) What NaOH mL 10 at volume of NaOH is needed to reach the end point of the titration?
b) What was the initial concentration of HCI?
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Indicates are substances that change in color as the acidity increases. There are a variety of indicators in nature, such as the red hydrangea and cabbage. If a hydrangea displays blue blooms, it is in soil that is acidic. If the hydrangea displays pink blooms, it’s growing in soil that is basic.

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    Barbara Gelbero
    2022-04-11T19:38:05+00:00Added an answer on April 11, 2022 at 7:38 pm

    The reaction between NaOH (HCl) and NaOH is shown by:

                NaOH(aq) + HCl(aq) —–> NaCl(aq) + H2O(l)

                1mole NaOH  = 1mole HCl

    For neutralization, 10mL of HCl will require 10mL NaOH solution

    Here is the HCl concentration.

                 MHCl . VHCl = MNaOH . VNaOH

                 MHCl * 10.0mL = 0.17M * 10.0mL

                 MHCl = 0.17 M

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