theannakittler7327
08.08.2019 •
Chemistry
Calculate the mass of sodium acetate (chacoona) required to prepare 50 ml of a 0.10 m sodium acetate solution. calculate the volume of 1 m sodium hydroxide (naoh) needed to prepare 10 mlcf a 0.10 m sodium hydroxide solution
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Ответ:
a)mCH3COONa=?, Vsln=50mL(0.05L); [sln]=0.1M∴M≡(mol/L)
b)VslnNaOH=?; [slnNaOH]=1M; Vsln2=10mlcf; [sln2]=0.1M
Explanation:
a) PMCH3COONa=82.03g/mol
⇒ 0.05L*0,1mol/L*82.03g/mol = 0.4102g CH3COONa
R/ mCH3COONa = 0.4102g
b) V1*M1 =V2*M2dilution form.
⇒V1*(1M) = (10mlcf)*(0.1M)
⇒V1 = ((10mlcf)*(0.1M))/(1M)
⇒V1 = 1mlcf
R/ Vsln NaOH = 1mlcf
Ответ:
4,5,6,7
Step-by-step explanation:
-1 < x ≤7 , x > 3 means that 3 < x ≤ 7