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To remove any remaining traces of another existing compound that might inhibit the crystallization of the phenol.

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Q: Why is the NaOH extract heated before acidification?
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Related questions

Why is NaOH heated before adding BaCl2?

By adding HCl, you can ensure the presence of the SO4(2-) ion.


Why the NaOH solution is heated before adding BaCl2 in the two solutions method for determination of purity of NaOH sample?

Why the NaOH is heated before adding in BaCl2 for determination of purity of NaOH sample?


What happens when NaOH plus NaAlO2 is heated in presence of N2?

NaAlo2 + Naoh


What happens to sodium hydroxide when heated?

At very high temperature NaOH is decomposed and Na2O fumes are emited.The reaction is:2 NaOH = Na2O = H2O


Why is it necessary to standardize the NaOH solution before titration?

It allows the concentration of the NaOH to be known.


Ammonia gas is given off when ammonium sulfate is heated with?

A base or alkali as NaOH, KOH, Ca(OH)2.


Why sodium extract is alkaline in nature?

It is because sodium reacts with water (present in test tube or porcelain basin) to give a alkaline solution of NaOH.


Why sodium extract is usually alkaline in nature?

It is because sodium reacts with water (present in test tube or porcelain basin) to give a alkaline solution of NaOH.


Why sodium extract usually alkaline in nature?

Because if sodium is not completely fused...it reacts with water giving out naoh..which is a alkali..hope u like it kid...


What happens when sodium hydroxide is added to ammonium chloride and heated?

Ammonia gas will be evolved. The chemical reaction is :NH4Cl + NaOH --> NH3 (g) + NaCl + H2O


What is the mass of 3.42 moles of NaOH?

3.42 moles NaOH (39.998 grams/1 mole NaOH) = 137 grams NaOH


How many liters of naoh are in 1.3 moles of 3.42 m of naoh?

Molarity = moles of solute/Liters of solution 3.42 M NaOH = 1.3 moles NaOH/Liters NaOH Liters NaOH = 1.3 moles NaOH/3.42 M NaOH = 0.38 Liters