Question

40 grame calciu de puritate 80 la sutareactioneaza cu o solutie de acid clorhidric :) aflati masa de acid clorhidric

Answer 1

-calculez masa de Ca pur
p= m,px100/m,i....................p=puritatea 
80/100= mp/40----> m,p= 32g Ca pur

-din ecuatia reactiei calculez masa de acid,cu masa molara 36,5g/mol

1mol....2mol
Ca   +  2HCl-------->  CaCl2  +  H2
40g.....2x36,5g
32g...........x..........................................calculeaza x=m,HCl