Chemical W

     Chemical w is unknown because it was different.  Also  it is unknown because its color its smell everything is different.  When I observed It was way different that I tough it was going to be.  I thought it was transparent because or we didn't put anything or pure water.  It could have been a substance that was different then chemical z,x etc.  The unknown chemical also , I noticed it had a different smell like if there was a different substance in that made it transparent.  The other colors looked blue green.  I dont know how?