yellow color. The water layer, bottom, will turn an amber color; separate and repeat the extraction with the other 50ml of acidic water.
The kerosene can now be discarded or set aside (just in case). The amber water needs to be washed with a little VM&P naptha. Use about 30ml and mix well so it can take up all the left over kerosene. This is the stage where you get rid of the nasty kerosene. Basify to ph>10 with 40% water solution of NaOH and add enough salt so no more will dissolve