Question

Змішали 57,5 г розчину, який містить 10% амоній гідроген сульфату, та 28 мл 8%-го розчину амоніаку ( густина 0,965г/мл). Визначити масові частки речовин в розчині, що утворився.

Answer 1

Дано
m1ppa=57.5g
W1(NH4HSO4)=10%
V(NH3)=28mL
W2(NH3)=8%
плотность(NH3)=0.965g/mL
найти 
W(NH4HSO4)-?
W(NH3)-?
Решение
находим массу вещества NH4HSO4
m(NH4HSO4)=m1ppa*W1=57.5*10/100=5.75g
находим массу вещества NH3
а) находим массу раствора NH3
mppa(NH3)=W2*плотность/100%=28*0.965/100=27.02 г.
mвва = mppa(NH3)*W(NH3)/100%=27.02*8/100=2.16g
находим массу образовавшегося раствора- смеси
m(cм)=mppa(NH4HSO4)+mppa(NH3)=57.5+27.02=84.52g
W(NH4HSO4)=mвва(NH4HSO4)/m(см)*100% =5.75/84.52*100=6.8%
W(NH3)=mвва(NH3)/m(см)*100% =2.16/84.52*100≈2.6%
ответ:6.8% N4HSO4, 2.6%NH3

Answer 2

Calculation of Mass Percentages in the Solution

To determine the mass percentages of the substances in the solution formed by mixing 57.5 g of a 10% ammonium hydrogen sulfate solution and 28 ml of an 8% ammonia solution (density 0.965 g/ml), we need to calculate the masses of the substances present in the final solution.

Let's start by calculating the mass of ammonium hydrogen sulfate in the 10% solution:

Mass of ammonium hydrogen sulfate = 10% of 57.5 g

To find the mass, we multiply the percentage by the total mass:

Mass of ammonium hydrogen sulfate = (10/100) * 57.5 g

Now, let's calculate the mass of ammonia in the 8% solution:

Mass of ammonia = 8% of 28 ml * density of ammonia

To find the mass, we multiply the percentage by the volume and density:

Mass of ammonia = (8/100) * 28 ml * 0.965 g/ml

Calculation Results

After performing the calculations, we find the following masses:

- Mass of ammonium hydrogen sulfate: 5.75 g [[1]] - Mass of ammonia: 2.1848 g [[1]]

Calculation of Mass Percentages

To determine the mass percentages of the substances in the final solution, we divide the mass of each substance by the total mass of the solution and multiply by 100.

Mass percentage of ammonium hydrogen sulfate = (mass of ammonium hydrogen sulfate / total mass of solution) * 100

Mass percentage of ammonia = (mass of ammonia / total mass of solution) * 100

To calculate the total mass of the solution, we need to convert the volume of the ammonia solution to grams using its density:

Total mass of solution = mass of ammonium hydrogen sulfate + mass of ammonia

Now, let's substitute the values and calculate the mass percentages:

Total mass of solution = 5.75 g + 2.1848 g

Total mass of solution = 7.9348 g

Mass percentage of ammonium hydrogen sulfate = (5.75 g / 7.9348 g) * 100

Mass percentage of ammonia = (2.1848 g / 7.9348 g) * 100

After performing the calculations, we find the following mass percentages:

- Mass percentage of ammonium hydrogen sulfate: 72.5% - Mass percentage of ammonia: 27.5%

Therefore, the mass percentages of the substances in the solution that was formed by mixing 57.5 g of a 10% ammonium hydrogen sulfate solution and 28 ml of an 8% ammonia solution are approximately 72.5% for ammonium hydrogen sulfate and 27.5% for ammonia.

Please note that these calculations assume ideal behavior and do not take into account any potential interactions between the substances in the solution.