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Ahoj, mohli byste mi pomoct s tímto příkladem?
Připravte 95g 20% HCl. K dispozici máte 38% koncentrovanou kyselinu a vodu. Kolik gramů koncentrované kyseliny a vody bude k přípravě potřeba?
Kolik ml roztoku 65 % HNO3 (ρ1 = 1.391 g/cm3) je třeba na přípravu 0,5 l roztoku s obsahem 10 % HNO3 (ρ2 = 1,05 g/cm3) ? Výsledek zaokrouhlete na jedno desetinné místo. postup?
Kolik gramů NaCl (M = 58,4g/mol) je třeba pro přípravu 250ml roztoku o hmotnostní koncentraci 10g/l? postup? děkuji
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