Question

va rog urgent dau coroana​

Answer 1

Răspuns:

c mdx100/ms----> m,d=30x10/100g=3gNaOH

miu.NaOH= 40g/mol

miu,H2SO4=98g/mol

2x40g..............98g

2NaOH   + H2SO4--->Na2SO4  + H2O

3g.........................x=

x=m=3,675gH2SO4

m,sol,acid= v X ro=10ml x 1,225g/ml= 12,25 g sol    1ml= 1cm³

12,25g sol.........3,675g acid

100g..sol...................x  (definitia concentratiei procentuale)

x=c=30%

Explicație: