Dobrý deň, potrebovala by som poradiť s dvomi príkladmi na výpočet bilančného pravidla. PR č.1 Koľko litrov vody je potrebné pridať k 0,5 litrom 40% NaOH (hydroxidu sodného) ρ =
1,43 g · cm−3
, aby sme pripravili 5% NaOH?
PR. č. 2: Koľko dm3 15% roztoku NaCl (chloridu sodného) ρ = 1,071 g · cm−3
je treba na prípravu 5
litrov 10% NaCl (ρ = 1,002 g · cm−3
)?
Ďakujem pekne.
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