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VA ROG MUUUUUUUUUUUUUUUULT, CU CALCULE

VA ROG MUUUUUUUUUUUUUUUULT CU CALCULE class=

Răspuns :

m=56mg hidroxid de potasiu (KOH)
Vs=10 mL volum solutie

Formula pentru a afla Concentratia molara este:
CM=n/Vs, unde n reprezinta numarul de moli de KOH

calculam masa molara de KOH
M=39*1+16*1+1*1=56mg/mmoli
n=m/M=56/56=1 mmol

CM=n/Vs=1/10=0,1 M
Raspunsul corect este A)0,1 M