Concentrated hydrochloric acid is supplied in the laboratory at a concentration of

CHEMISTRY · Multi-part · AP · Chemistry · Atomic Structure and Properties · Atomic Structure and Properties

Problem

Concentrated hydrochloric acid is supplied in the laboratory at a concentration of 12.0 mol L−112.0\,\text{mol}\,\text{L}^{-1}. A biochemistry protocol requires 1.00 L1.00\,\text{L} of 0.250 mol L−10.250\,\text{mol}\,\text{L}^{-1} HCl. (a) Determine the volume, in millilitres, of the 12.0 mol L−112.0\,\text{mol}\,\text{L}^{-1} stock solution needed to prepare the desired dilute solution. (b) Calculate the volume of distilled water that must be combined with the stock acid to reach a final solution volume of 1.00 L1.00\,\text{L}. (c) Describe two safety considerations that must be observed when diluting concentrated HCl to the desired concentration, and explain the chemical reasoning behind each precaution.

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