Q:
# How many grams of KI are in 25.0 ml of a 3.0 percent KI solution?

Assuming that a 3 percent solution represents a mass of solute in grams per volume of solution, there are 0.75 grams of KI in 25 mL of solution. However, the term percent solution is ambiguous; it can represent ratios of mass/mass, mass/volume or volume/volume.

Continue ReadingIf a 3 percent KI solution represents a mass over volume ratio in grams of solute per 100 mL solution, then the mass of KI in the solution is (3.0 grams KI / 100 mL solution) * 25 mL solution = 0.75 grams KI.

Using other definitions of a 3 percent solution, more information is needed to solve the problem. For example, if a 3 percent solution represents the ratio of mass of solute per total mass of the solution, then the density of the solution is first required to determine the mass of the solution in grams. Then, the number of grams of KI is 3 percent of the total mass of the solution.

If a 3 percent solution represents volume of solute in mL per total volume of solution in mL, then this means that there are 0.75 mL KI in the solution. In this case, the density of liquid KI would be required to convert 0.75 mL KI to the mass of KI in grams. However, KI is typically a solid salt. It has a melting point of 954 degrees Kelvin; therefore, it is unlikely that the context of this problem uses a volume/volume percentage.

Learn more about Solutions & Mixtures-
Q:
## What is the balanced molecular equation for KI and AgNO3?

A: The balanced molecular equation for the reaction between KI and AgNO3 is written as KI + AgNO3 = AgI + KNO3. For an equation to be balanced, it must contai... Full Answer >Filed Under: -
Q:
## What are the two parts of a solution?

A: The two parts of a solution are the solvent and the solute. When the two parts combine to make a solution, the properties of the solution differ from the p... Full Answer >Filed Under: -
Q:
## What is a non-volatile solute?

A: A non-volatile solute has a low tendency to escape as vapor from a solution. Its vapor pressure is less than the vapor pressure of the solvent. Full Answer >Filed Under: -
Q:
## How do you calculate molarity?

A: Molarity is an unit for expressing the concentration of a solute in a solution, and it is calculated by dividing the moles of solute by the liters of solut... Full Answer >Filed Under: