Question

Nu-mi dau seama de ea

Answer 1

Cm=n/Vs

SOLUTIA 1           

n=CmxVS

n=0,1x0,01=0,001

Vs=10mL/1000=0,01 L

SOLUTIA 2

Vs=5mL=5/1000=0,005 L

n=0,2x0,005=0,001 moli

Solutia obtinuta

n+n=0,001+0,001=0,002

Vs=10 mL sol1+5 mL sol2+10 mL apa=25 Ml=25/1000=0,025L

Cm obt=0,002/0,025=0,8M

NaOH-BAZA TARE DE UNDE REZULTA CA

[HO-]=Cm

[HO-]=0.8

pOH=-log[HO-]=-log0,8=0,10

pH+pOH=14

pH=14-0,1=13,9