Question

Обчисліть масу мила одержаного в результаті лужного гідролізу натрій гідрооксиду та тристирину масою 150 г

Answer 1

По-перше не тристерин , а тристеарин !
Дано:
m((C17H35COO)3C3H5)=150 г
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m(C17H35COONa) - ?
       0,2 моль
(C17H35COO)3C3H5 + 3NaOH -------------------->
       1 моль
   x моль
3C17H35COONa
  3 моль
 (стеарат натрію, натрієва сіль вищої жирної кислоти (стеаринової) , основна складова частина твердого мила)+ C3H5(OH)3
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m(C17H35COONa)= v*M
Кількість речовини твердого мила знайдемо через кількість речовини , маса якої нам дана:
v( (C17H35COO)3C3H5)= 150 г /891,5 г/моль ≈ 0,2 (моль)
x= (0,2 моль *3 моль): 1 моль= 0,6 моль
m(C17H35COONa)=0,6 моль*306 г/моль=183,6 (г)

Answer 2

Calculating the Mass of Glycerol Obtained from the Alkaline Hydrolysis of Sodium Hydroxide and Tristearin

To calculate the mass of glycerol obtained from the alkaline hydrolysis of sodium hydroxide and tristearin, we can use the following chemical equation for the reaction:

Tristearin + Sodium Hydroxide → Glycerol + Sodium Stearate

The molar mass of tristearin (C57H110O6) is 891.5 g/mol, and the molar mass of sodium hydroxide (NaOH) is 40 g/mol. Glycerol (C3H8O3) has a molar mass of 92 g/mol.

First, we need to determine the moles of tristearin and sodium hydroxide involved in the reaction, and then use stoichiometry to find the moles of glycerol produced. Finally, we can convert the moles of glycerol to grams to find the mass obtained.

Calculation Steps:

1. Calculate the moles of tristearin (C57H110O6): - Molar mass of tristearin = 891.5 g/mol - Given mass of tristearin = 150 g - Moles of tristearin = Given mass / Molar mass - Moles of tristearin = 150 g / 891.5 g/mol

2. Calculate the moles of sodium hydroxide (NaOH): - Molar mass of sodium hydroxide = 40 g/mol - Given mass of sodium hydroxide is not provided, so we cannot calculate the moles of sodium hydroxide without this information.

3. Use stoichiometry to find the moles of glycerol produced: - The balanced chemical equation is needed to perform this step, but it's not provided in the user's query.

Without the given mass of sodium hydroxide and the balanced chemical equation, it's not possible to accurately calculate the mass of glycerol obtained from the alkaline hydrolysis of sodium hydroxide and tristearin. If you have the additional information required, please provide it so that I can assist you further.