Express concentrations of solutions quantitatively by preparing different concentrations of mixtures according to uses and availability of materials. Solve problems involving the percentage by volume of the given solutions.
What are quantitative methods of expressing concentration of solutions? You can describe the concentration of solutions qualitatively (by simply observing their appearance) and quantitatively (by comparing the number of drops per volume of water). Therefore, we need more exact, quantitative methods of expressing concentration. We will apply your analytical and mathematical skills to our activities! It is defined as the volume of solute present in 100 mL of solution (% v/v). This method is especially useful for liquid solutions. Mathematically, it can be expressed with its formula shown in the presentation.
Composed of 2 or more substances physically combined together.
A number or ratio that can be expressed as a fraction of 100.
The measure of the amount of solute that has been dissolved in a given amount of solvent or a solution.
Have you notice commercial products in grocery stores or even in your home, such as alcohol and beverages?
One example is the rubbing alcohol. There are writings on its label that state whether it has 70% or 40% isopropyl or ethyl alcohol. What does that mean? This shows the qualitative amount of solute in the solution.
What is concentration? Concentration of solution is the measure of the amount of solute that has been dissolved in a given amount of solvent or a solution. It may be concentrated or dilute solution. The picture on the screen shows the difference of concentrated solution from a dilute solution in terms of its appearance.
What are quantitative methods of expressing concentration of solutions?
You can describe the concentration of solutions qualitatively (by simply observing their appearance) and quantitatively (by comparing the number of drops per volume of water). Therefore, we need more exact, quantitative methods of expressing concentration. We will apply your analytical and mathematical skills to our activities!
We will apply your analytical and mathematical skills to our activities!
It is defined as the volume of solute present in 100 mL of solution (% v/v). This method is especially useful for liquid solutions. Mathematically, it can be expressed with its formula below:
It is defined as the volume of solute present in 100 mL of solution (% v/v). This method is especially useful for liquid solutions. Mathematically, it can be expressed with its formula below:
Basically, in problem solving we always follow the 5 basic steps. 1) Know what is being asked. 2) What are the important given data. 3) What is the formula. 4) What is the solution/ How will you solve the problem? 5) What is the answer?
Basically, in problem solving we always follow the 5 basic steps. 1) Know what is being asked. 2) What are the important given data. 3) What is the formula. 4) What is the solution/ How will you solve the problem? 5) What is the answer?
1. Which alcohol is more effective as antiseptic and disinfectant? Why?
2. Why it is important to read the product label when buying a certain product on the store?
1. Which alcohol is more effective as antiseptic and disinfectant? Why?
2. Why it is important to read the product label when buying a certain product on the store?
The concentration of the alcohol in bottle A is more concentrated because it contains 70% alcohol
solution, while that in bottle B contains 40% alcohol solution
1. Which alcohol is more effective as antiseptic and disinfectant? Why?
2. Why it is important to read the product label when buying a certain product on the store?
1. Which alcohol is more effective as antiseptic and disinfectant? Why?
2. Why it is important to read the product label when buying a certain product on the store?
1. Which alcohol is more effective as antiseptic and disinfectant? Why?
2. Why it is important to read the product label when buying a certain product on the store?
1. Which alcohol is more effective as antiseptic and disinfectant? Why?
2. Why it is important to read the product label when buying a certain product on the store?
1. Which alcohol is more effective as antiseptic and disinfectant? Why?
2. Why it is important to read the product label when buying a certain product on the store?
