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What happens when a crystal of potassium nitrate is added to the saturated solution as it is cooled?
Yes, since the solubility of a solid solute in liquid solvent is decreased when the temperature is reduced, then the amount of of solute beyond the solubility limit must crystallize out of solution
How can you effectively dilute aqueous solutions to achieve the desired concentration?
To effectively dilute aqueous solutions to achieve the desired concentration, you can add a specific volume of solvent (usually water) to the original solution. The dilution formula is C1V1 C2V2, where C1 is the initial concentration, V1 is the initial volume, C2 is the desired concentration, and V2 is the final volume after dilution. By calculating the appropriate volumes of the original solution and solvent needed, you can achieve the desired concentration.
What is the initial colour of an iodine solution?
The initial color of an iodine solution is yellow-brown.
A biochemist wishes to dilute 75 ml of an aqueous 3.5 M H2SO4 solution to an aqueous 2 M H2SO4 solution. How much water should be added to the solution?
To dilute the 3.5 M H2SO4 solution to 2 M, you need to add water. Use the formula M1V1 = M2V2, where M represents molarity and V represent volume. For this situation, you'll end up adding 75 ml of water to the initial 75 ml of 3.5 M H2SO4 solution to achieve a final 2 M concentration.
If 2.0 mL of 6.0M HCl is used to make a 500.0-mL aqueous solution what is the molarity of the dilute solution?
The number of moles of HCl in the initial solution can be calculated using the formula M1V1 = M2V2, where M1 = 6.0 M, V1 = 2.0 mL, V2 = 500.0 mL, and M2 is the unknown molarity. Solving for M2 gives a molarity of 0.024 M for the dilute solution.
How many grams of crystals will b formed if a saturdayed potassium nitrate solution is cooled from 60 to 30?
The amount of crystals formed will depend on how much potassium nitrate was dissolved in the solution to begin with. As the solution cools from 60°C to 30°C, potassium nitrate will begin to crystallize out of the solution. The exact amount of crystals can be determined by calculating the solubility of potassium nitrate at 30°C and comparing it to the initial concentration in the solution.
What is the effect on the molarity of a solution of adding more solvent to a solution?
Adding more solvent to a solution decreases the molarity of the solution. This is based on the principle that initial volume times initial molarity must be equivalent to final volume times final molarity.
What is the initial pH of the solution in the Erlenmeyer flask?
The initial pH of the solution in the Erlenmeyer flask would depend on the specific substances present in the solution. If it is just pure water, the initial pH would be around 7 (neutral). If there are acids or bases present, the pH could be below 7 (acidic) or above 7 (basic), respectively.
What impurity is removed during the recrystallization process?
During the recrystallization process, impurities present in the initial sample are removed by dissolving the sample in a hot solvent and then allowing it to cool slowly. As the solution cools, impurities are excluded from the growing crystal lattice and remain in the solvent or are trapped within small crystals that are later filtered out. The final purified crystal product is then separated from the remaining solution.
A 2.14g sample of sodium hypoiodite is dissolved in water to make 1.25 L of solution the solution pH is 11.32 what is the KB for the hypoiodite ion?
To find the pOH from the given pH value (pH = 11.32), subtract the pH from 14 (pH + pOH = 14) to get pOH. Then use the pOH to find the hydroxide ion concentration in the solution. Finally, use the hydroxide ion concentration along with the initial concentration of hypoiodite ion to determine the KB value for the hypoiodite ion using the expression for the KB of a weak base.
The thesis of a problemsolution essay should include?
both a problem and a solution. The initial statment of what the essay is about ? a problem and a proposed solution
What is amount of caustic required to adjust pH of solution?
This depends on the desired pH, volume of solution, initial pH, etc.
