Paris Green 67 



QUESTIONS 

 (To be answerd in the notebook.) 



1. Name the acidic and basic ions used in making 

 Paris green. 



2. What shaped particle has the largest ratio of m/s'i 



3. What are the relativ advantages of Paris greens 

 composed of large particles; of small particles; of 

 particles of spherical shape; of broken cornered par- 

 ticles? (Discuss in reference to degree of hydrolysis 

 and time of suspension.) 



4. What is the objection to putting Paris green in 

 water several days before using? Of applying on a wet 

 day? 



5. How many grams of crystallized sodium carbon- 

 ate, Na2CO3*10H2O, could be made from 10 grams of 

 the anhydrous salt? 



6. Water hydrolyzes Paris green. State some of 

 the possible products of hydrolysis. Which of these 

 are soluble? 



7. Write a symbol for orthoarsenious acid; meta- 

 arsenious acid. (See textbook.) 



8. Write a reaction between Na2C03 and AS2O3 

 naming all the substances. 



9. Write the s^nnbol of acetic acid. 



10. How many grams of arsenic trioxid will react 

 with 24 grams of dry sodium carbonate? 



