Can you match the following cleaning agents with the correct letter in the 2nd table? And remember to never use more than you have to!
| ammonia |
| ammonium fluoride |
| citric acid |
| EDTA |
| hydrochloric acid |
| nitric acid |
| sodium hydroxide |
| sulfamic acid |
Characteristics
| Cleaning Compound | What It Dissolves or Reacts With | usage | remarks |
| A | most water scales and corrosion products | boilers, heat exchangers, pipelines, bricks | <175 oF; will corrode steel |
| B | most water scales and corrosion products | stainless steel and aluminum | cannot be used on copper or ferrous alloys |
| C | silicate deposits | mixed with HCl to form HF | |
| D | calcium salts | additive for HCl; or replacement | pricier, less toxic and less volatile than HCl; won’t make chlorine if accidentally added to hypochlorite |
| E | iron oxides | boilers, often mixed with ammonia& oxidizers | ineffective on water scale |
| F | oil grease | pre& post-cleaner for acid-cleaning | |
| G | copper ions form complexes with it | large boilers | |
| H | water scales at alkaline pHs | cleans water systems without shutdown | pricy |
Answers:
A) hydrochloric acid (HCl)
B) nitric acid (HNO3)
C) ammonium fluoride
D) sulfamic acid,H3NSO3
E) citric acid(C6H8O7)
F) sodium hydroxide(NaOH)
G) ammonia(NH3)
H) EDTA(C10H16N2O8)o quit talking and begin doing.
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