Preparation of an aqueous solution of potassium dichromate

Given the dangers of potassium dichromate: 

 

H272 May intensify fire; oxidising 

H301 Toxic if swallowed 

H312 Harmful in contact with skin 

H314 Causes severe skin burns and eye damage 

H317 May cause an allergic skin reaction 

H330 Fatal if inhaled 

H334 When inhaled, can cause allergy or asthma symptoms or breathing difficulties 

H340 May cause genetic defects 

H350 May cause cancer. 

H360 May damage fertility or the unborn child 

H372 Causes damage to organs through prolonged or repeated exposure 

H410 Very toxic to aquatic life with long lasting effects 

 

should be avoided its use at this level of education. Moreover, the only purpose of the experiment is to teach students to prepare solutions, then an innocuos substance should be used instead.