Task12. Salt Salt! Is civilized people think without his meal? And extract it without difficulty, and it costs a penny. Only, perhaps, a mineral that we eat in its natural form, except that the ground to the desired state. Sauerkraut, pickles, salted and dried fish - salt is everywhere, so accessible and regular.
Chemists call table salt - a necessary component of food.
Figure 14
Question 1. When in Ireland there was a painful punishment: prisoners received only bread and water without the addition of this substance. After a while these people died, and their bodies began to decompose immediately ...
And the inhabitants of some island states, to satisfy the need for this matter, eating raw fish, dipping it in salt water. What is this stuff?
H2O
NaCl
NaI
Na2CO3
Answer:.
Question 2: How can I clear the table salt, polluted river sand? A Salt solution may be cleaned from sand evaporation yes / no
B. The salt solution can be separated from the sand filtration yes / no
C. The salt solution from the sand may be cleaned with cold water Yes / No
Answer:.
Question3: S------ SО2H2SO3
