Question

Rezolvați aceasta problema, URGENT!

Answer 1

Răspuns:

-calculez masa de clor pur si nr.moli

p=m,purx100/m,impur---> m,pur= 1775x80/100g= 1420gCl2 pur

miu,Cl2= 71g/mol----> niu=m/miu= 1420/71mol= 20mol Cl2

deduc moli Na SI moli NaCl din ecuatia chimica

1mol........2mol.........2mol

Cl2  +  2Na---> 2NaCl

20mol.....x...........y

x= 40mol Na

y=40mol NaCl

a. miu,NaCl= 58,5g/mol----> m= niuxmiu=40x58,5g=2340gNaCl

b.40mol

c. m,impuritati=m,clor impur-m,clor pur=1775g-1420g=355g

%impuritati= 20%

Explicație: