Solutions
What is a solute and solvent in a solution?
Solute is what is being dissolved, a solvent is what is dissolving.
According to the Solubility Curves chemistry reference table, how does a decrease in temperature from 40oC to 20oC affect the solubility of NH3 and KCl?
The solubility of NH3 increases and the solubility of KCl decreases.
What is the formula for Molarity?
moles of solute/liters of solution
Parts per million is equal to...
(The equation)
(grams of solute/grams of solution) * 1,000,000
What is the solute and solvent in an NaCl (aq) solution?
Solute is NaCl, and the solvent is Water.
According to the Solubility Curves chemistry reference table, approximately how many grams of KClO3 are needed to saturate 100 g of H2O at 40oC?
17 g
Which has a higher Molarity?
a) 2 moles of solute dissolved in 3 liters of solution
b) 4 moles of solute dissolved in 8 liters of solution
a -- 2 moles of solute dissolved in 3 liters of solution
What is the mass of KCl in 250 grams of a 10.0% solution?
25 g of KCl
Why is Milk not considered a solution?
It is not transparent and light is dispersed within.
At 10oC, 23 g of a substance saturates 100g of water. According to your Reference Table, what could this substance be?
KNO3
What is the molarity of KF (aq) solution containing 116 g of KF in 1.00 liter of solution?
2 M
A 500g sample of an aqueous potassium chloride solution contains 0.025g of solute. What is the concentration of the solution in parts per million?
50 ppm
List the Five Characteristics of Solutions.
Homogenous Mixtures
Transparent and do not disperse light
Can have color
Will not settle on standing
Will pass through a filter
A solution containing 55g of NH4Cl in 100g of water is saturated ata temperature of...
57oC
How many liters of 0.5 M sodium hydroxide solution would contain 2 moles of solute?
4 Liters
What is the total number of grams of KCl (formula mass=74.6) in 2.00 liter of 2 molar solution?
298.4 g of KCl
What does "like dissolves like" mean? Explain in terms of polarity and ionic.
Like dissolves like means that soluteswith the same polarity (polar or nonpolar) as the solvent will dissolve in the solvent. Ionic will dissolve in polar solvents.
Based on the Solubility Curves Chemistry reference table, when 100g of water saturated with KNO3 at 70oC is cooled to 25oC, the total number of grams of KNO3 that will precipitate is...
95 g of KNO3
1 M solution contains 20 grams of solute in 500mL of solution. What is the mass of 1 mole of the solute?
40 g
A 1,000 g sample of drinking water was found to contain 3.0 x 10-3 g chlorine. What is the concentration of chlorine in ppm?
3.0 ppm