#### Porcentaje De Concentración De Soluciones | Ejemplos (Parte V)

Oh, and since we are welcome to this new chemistry video here in help each point with the topic that we will see next and in our sixth video about what concentration percentages are then so for that, we go straight to the point, and we have the following application problem that tells us what more than 100 grams of an aqueous solution than sodium hydroxide at 35% more by volume, with a solution density of 1.30 grams per milliliter is acquired to obtain 30 grams of the base or 30 grams, absolute. Perfect let's go to the first thing we are going to do with this issue, extract the data that it gives us. It does not mention that. It is an aqueous solution. We already know that the solvent is water, and the solute would be sodium hydroxide, and that it has a percentage more than volume percentage more by volume of 35% that if we want to break it up, it would be as follows: 35 grams of sodium hydroxide than the solute between 100 milliliters of the solution. In total, ok, p, effect that another piece. Of information gives us tells us that the density of the solution is equal to 1.30 grams of the solution, divided by one milliliter of that solution.

Now it tells me that we want to obtain 40 grams of sodium hydroxide, that is, of the base, that is to say of the solute that the initial conditions that you want to not say that you want to obtain 40 grams of this sodium hydroxide. So we are going to place it here, 40 grams of sodium hydroxide. Ok.

They ask me what would be the grain mass of. This solution, well, I want get rid of these grams of sodium hydroxide. We are going to use factors as if they were conversion factors. They are giving me here, the percentage of mass volume that tells me that every 35 grams of sodium hydroxide.

There are 100 milliliters of the solution. And after that I can use this to obtain the milliliters that are in the solution. And after using the density to go from milliliters to grams and obtain how much would be the amount of grams that was produced from 40.

Grams of sodium hydroxide, ok, perfect let's. See let's use this as a conversion factor. We are going to invert it to simplify. We get sodium hydroxide that is 100 milliliters of the solution for every 35 grams of EEA, sodium, hydroxide, Grams of sodium hydroxide are simplified with grams and of sodium oxide, and I am left with this expressed as milliliter of the solution. But the problem is asking me, what is the most in grams of the solution that is required to obtain 40 grams of sodium hydroxide and to. Our civilization, those 40, we got rid of its 40 grams of sodium hydroxide. Now we are going to use the density of the solution in total, if it is simple that we are not giving here to go from million resolution to gram of solution.

It tells me then 1.30 grams of the solution between a milliliter of the solution. We simplify million resolution as the solution editor, and I am left with this expressed in terms of mass, that is in terms of gram of the solution. So 40% times 1.30, divided by 35, and that. Gives me a total of 149 grams of the solution was obtained from these 40 grams of sodium hydroxide, or rather, whoever owns 140 grams of solution to obtain 40 grams of sodium hydroxide at 35% more by volume, 35 grams of sodium hydroxide for every 100 milliliters of solution. I remembered woman, percentages more by volume. It cannot be made cheaper like the other thing that was taken.

It was disrupted. Furthermore, it was disrupted to use it as a factor of conversion. Not the percentage more to volume will almost. Always live linked to what the density of the solution is, so I can get rid of those milliliters of solution that I have at the bottom, but it will not always be like that in most cases, but you are going to see that some cases are not going to give the density of the solution. So with this we have reached the end of the video by ear of the sane decided with any doubt with any comment with n, any suggestion by leaving it down here in the comments, this video on our website, help Inca dotcom. We also. Want to leave our social networks in case, you want to follow us on Twitter, debtor English.

If you want to like us on Facebook, facebook.com is the ceiling. So good regards and see you in the next video. If God allows us until next time.

Dated : 18-Apr-2022