Question

Дано m(KOH) - 9,6 г m(MgOH2) - 11,6г Найти ω(омега)(KOH)-?

Answer 1

Решение:
ω(в-ва)=m(в-ва):m(р-ра)*100%
m(р-ра)=m(KOH)+m(Mg(OH)2)=9,6г+11,6г=21,2г
ω(KOH)=9,6г : 21,2г ≈ 0,45*100%=45%
ответ:
ω(KOH)=45%

Answer 2

To find the mass fraction (ω) of KOH, we need to calculate the mass of KOH and divide it by the total mass of the solution.

Given: m(KOH) = 9.6 g m(MgOH2) = 11.6 g

To calculate the mass of KOH, we need to subtract the mass of Mg(OH)2 from the total mass: m(KOH) = Total mass - m(MgOH2)

Total mass = m(KOH) + m(MgOH2) Total mass = 9.6 g + 11.6 g Total mass = 21.2 g

Now we can calculate the mass fraction (ω) of KOH: ω(KOH) = m(KOH) / Total mass

ω(KOH) = 9.6 g / 21.2 g ω(KOH) ≈ 0.4528

Therefore, the mass fraction of KOH (ω(KOH)) is approximately 0.4528 or 45.28%.