237.5 mL (200mL if you are keeping track of significant figures).
Molarity is moles/liters. To make 900mL of a 2M solution, you need 1.8 moles of solute. There are 1.8 moles of solute in 237.5 mL of 8M solution.
True. A concentrated solution can be made more dilute by adding more solvent, which increases the volume of the solution and decreases the concentration of the solute. This process effectively reduces the ratio of solute to solvent, resulting in a less concentrated solution.
To create a 12% solution from a 9% solution, you can mix the 9% peroxide with a concentrated hydrogen peroxide solution to increase the concentration. The specific volumes needed would depend on the concentrations of the starting solutions and the final volume desired. It's important to handle concentrated hydrogen peroxide with caution and use appropriate safety measures.
The statement is true. Solvent is what you dissolve a solute in. In chemistry, your solvent is usually going to be water. So, if you have a concentrated solution and you pour some more water into it, you're diluting the solution.
Calcium sulfate is very low soluble in water - 2,1 g/L at 20 0C.
You need 6,9 mL stock solution.
concentrated solution
To prepare 1 M hydrochloric acid (HCl) solution, you usually need to dilute concentrated HCl solution (~35-37% HCl) with water in a specific ratio. The specific volume of concentrated HCl needed depends on its concentration and the final volume of the 1 M solution you want to make. In this case, 85 ml of concentrated HCl is likely to be the volume needed to make 1 L of 1 M HCl solution.
To make a 1% HCl solution from a 35% HCl solution, you would need to dilute the concentrated solution with water. The ratio of concentrated HCl to water would be approximately 1:34. So, to make 1% HCl, you would mix 1 part of the 35% HCl solution with 34 parts of water.
you can change the solute
To make a solution more concentrated, you can increase the amount of solute (what is being dissolved) in the solvent (what is doing the dissolving) while keeping the volume of the solution constant. This will increase the ratio of solute to solvent, making the solution more concentrated.
Dilution is the process of making a solution less concentrated by adding more liquid to it.
Choose an acid and then add acid to water (and NEVER add water to acid). The amount of water, depends on the exact concentration of the dilute acid needed. The molecular formula of the acid will not vary after dilution, just its concentration will reduce.
You add more solvent.
To make a concentrated solution weaker, you can add more of the solvent (such as water) to dilute it. Adding more solvent will decrease the concentration of the solute, making the solution less concentrated.
True. A concentrated solution can be made more dilute by adding more solvent, which increases the volume of the solution and decreases the concentration of the solute. This process effectively reduces the ratio of solute to solvent, resulting in a less concentrated solution.
To make a sugar solution more concentrated, you can heat the solution to evaporate some of the water content, thus increasing the ratio of sugar to water. Another way is to keep the solution in an open container to allow water to evaporate naturally, leaving behind a more concentrated sugar solution.
To make a 15% hydrochloric acid (HCl) solution, you need to dilute concentrated hydrochloric acid with water. The formula to calculate the volume of concentrated acid (C1) needed to make a desired volume of diluted acid (C2) is C1V1 = C2V2. For example, to make 1 liter of 15% HCl solution from a concentrated solution of 37% HCl, you would need to mix approximately 405 mL of the concentrated acid with 595 mL of water. Always remember to add acid to water slowly and with caution due to the exothermic nature of the reaction.