Percent by Mass PPT.pptx
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Percent by mass is a measurement of the concentration of a solute dissolved in a solution. It is calculated by taking the mass of the solute divided by the total mass of the solution and multiplying by 100. Examples are provided of calculating percent by mass for solutions containing sugar, salt, orange juice powder in water. The mass of the solute is divided by the total mass and multiplied by 100 to determine the concentration as a percentage.
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Here are the steps to solve this problem:
1. Mass of solute (sugar) = 25 g
2. Mass of solution (water + sugar) = 25 g + 80 g = 105 g
3. % mass of solute = (Mass of solute/Mass of solution) x 100
= (25 g/105 g) x 100
= 23.8%
4. % mass of solvent (water) = 100% - % mass of solute
= 100% - 23.8%
= 76.2%
Therefore, the concentration of the solute (sugar) is 23.8% by mass and the concentration of the solvent (water) is 76.2
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Here are the steps to solve this problem:
1. Mass of solute (sugar) = 25 g
2. Mass of solution (water + sugar) = 25 g + 80 g = 105 g
3. % mass of solute = (Mass of solute/Mass of solution) x 100
= (25 g/105 g) x 100
= 23.8%
4. % mass of solvent (water) = 100% - % mass of solute
= 100% - 23.8%
= 76.2%
Therefore, the concentration of the solute (sugar) is 23.8% by mass and the concentration of the solvent (water) is 76.2
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The document provides information on different ways of expressing the concentration of solutions, including percent by mass, mole fraction, molarity, molality, percent by volume, and parts per million (ppm). It discusses an activity where students are asked to mix a substance with water and observe whether the mixture is uniform or non-uniform. Finally, it defines key terms related to solution concentration such as solution, solute, solvent, concentration, solubility, miscible, and immiscible.
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This document discusses important concepts for preparing solutions in biotechnology. It defines key terms like solute, solvent, concentration, and solution. It explains different units for expressing concentration, such as weight/volume percent, molarity, and normality. Examples are provided for calculating amounts of solute needed to make solutions of a given concentration and volume. Equations are presented for diluting stock solutions to prepare solutions of lower concentration. Serial dilutions are also introduced as a method to make a series of progressively more dilute solutions from a concentrated stock.
MOLARITY.pptx
This document defines molarity as the number of moles of solute per liter of solution. It provides the molarity formula that calculates molarity as the ratio of moles of solute to volume of solution in liters. Examples are given to demonstrate calculating molarity from grams of solute and volume of solution or from moles of solute needed to make a specific volume of solution at a given molarity. Activities ask the reader to calculate moles of solute or volume of solution given specific values.
πως λύνουμε προβλήματα περιεκτικότητας
The document provides examples for solving various chemistry problems involving solutions and concentrations. It begins by showing the steps to take in writing known and unknown values for different types of problems. Several practice problems are then worked through as examples, such as calculating the mass of a solute given the concentration and total mass of a solution. The key steps are writing the knowns and unknowns, setting up the proper proportion, simplifying, and performing the necessary calculations. The document also discusses what happens to concentration when water is evaporated from a solution.
πως λύνουμε προβλήματα περιεκτικότητας
The document provides examples for solving various chemistry problems involving solutions and concentrations. It begins by showing the steps to take in writing known and unknown values for different types of problems. Several practice problems are then worked through as examples, such as calculating the mass of a solute given the concentration and total mass of a solution. The effects of diluting or evaporating water from a solution on concentration are also discussed.
LESSON-2.-CONCENTRATION-OF-SOLUTIONS.pdf
This document provides an overview of solutions and mixtures. It defines key terms like homogeneous and heterogeneous mixtures, solutes and solvents, concentration, and solubility. It also discusses different units used to measure concentration, including molarity, molality, and percent composition. Methods for separating mixtures like distillation, filtering, and chromatography are also outlined. The document provides examples of calculating concentration using various units and solving stoichiometric problems involving solutions.
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B.Sc.II semester, Biotechnology / Biochemistry lab manual
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Percent by Mass PPT.pptx
- 3. Percent by Mass -Percent by mass is the ratio of the mass of the solute with the mass of the solution Formula:
- 4. Example 1. A 300 grams sugar solution contains 15 grams sugar. What is the percent by mass of the solute in the solution?
- 5. Solve 1. A 150 grams salt solution contains 25 grams sugar. What is the percent by mass of the solute in the solution?
- 6. Solve 2. A saline solution with a mass of 355 g has 36 g of NaCl dissolved in it. What is the mass/mass percent concentration of the solution?
- 7. Example: 2. You prepared an orange juice by adding 75 grams of powdered juice to 175 grams of water. Determine the percent by mass of the solution.
- 8. Solve: 1.A solution was prepared by dissolving 25.0 g of sugar into 100. 0 g of water. What is the percent by mass of a solution
- 9. Solve: 1.Suppose a solution was prepared by mixing 20 g of sugar into 75 g of water. What is the percent by mass of a solution?
- 10. Solve What is the percent by mass of a solution if a solution if it has 5 g of salt for every 95 g of water?