Question

К 180гр 4%ного раствора ацетата калия добавили 120гр 6%ного раствора этой же соли.Массовая доля соли в полученном растворе равна?

Answer 1

Находим массу ацетата калия=180х0,04=7,2 г  в первом растворе
во втором растворе масса ацетата кали=120х0,06=7,2 г
масса ацетата кали=7,2+7,2=14,4 г
масса раствора=120+180=300 г
массовая доля раствора=14,4\300х100%=4,8%

Answer 2

Calculation of the Mass Fraction of Salt in the Solution

To calculate the mass fraction of salt in the solution, we need to consider the masses and concentrations of the two solutions that were mixed.

Let's denote: - Mass of the first solution (4% potassium acetate solution) as m1 = 180 g - Mass of the second solution (6% potassium acetate solution) as m2 = 120 g

The mass fraction of salt in the resulting solution can be calculated using the following formula:

Mass Fraction = (Mass of Salt in Solution) / (Total Mass of Solution)

To find the mass of salt in the solution, we need to calculate the masses of salt in each of the two solutions and add them together.

Calculation of the Mass of Salt in the First Solution

The first solution is a 4% potassium acetate solution with a mass of 180 g. To calculate the mass of salt in this solution, we need to multiply the mass of the solution by the concentration of the salt.

The concentration of the salt in the first solution is 4%. This means that there are 4 grams of salt in every 100 grams of the solution.

Mass of Salt in the First Solution = (4% / 100%) * Mass of the First Solution

Substituting the given values: Mass of Salt in the First Solution = (4/100) * 180 g

Calculation of the Mass of Salt in the Second Solution

The second solution is a 6% potassium acetate solution with a mass of 120 g. Using the same logic as above, we can calculate the mass of salt in this solution.

Mass of Salt in the Second Solution = (6% / 100%) * Mass of the Second Solution

Substituting the given values: Mass of Salt in the Second Solution = (6/100) * 120 g

Calculation of the Total Mass of the Resulting Solution

To calculate the total mass of the resulting solution, we need to add the masses of the two solutions together.

Total Mass of the Resulting Solution = Mass of the First Solution + Mass of the Second Solution

Substituting the given values: Total Mass of the Resulting Solution = 180 g + 120 g

Now that we have calculated the mass of salt in each solution and the total mass of the resulting solution, we can calculate the mass fraction of salt in the resulting solution using the formula mentioned earlier.

Mass Fraction of Salt in the Resulting Solution = (Mass of Salt in the First Solution + Mass of Salt in the Second Solution) / Total Mass of the Resulting Solution

Substituting the calculated values: Mass Fraction of Salt in the Resulting Solution = [(4/100) * 180 g + (6/100) * 120 g] / (180 g + 120 g)

Now, let's calculate the mass fraction of salt in the resulting solution.

Calculation:

Mass Fraction of Salt in the Resulting Solution = [(4/100) * 180 g + (6/100) * 120 g] / (180 g + 120 g)

Simplifying the equation: Mass Fraction of Salt in the Resulting Solution = (7.2 g + 7.2 g) / 300 g

Calculating the numerator: Mass Fraction of Salt in the Resulting Solution = 14.4 g / 300 g

Dividing the numerator by the denominator: Mass Fraction of Salt in the Resulting Solution = 0.048

Therefore, the mass fraction of salt in the resulting solution is 0.048 or 4.8%.

Please note that the calculations provided above are based on the information given in the question. If there are any additional factors or considerations that need to be taken into account, please provide them for a more accurate answer.