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What is the difference between partial molal quantities and partial molar quantities?
Partial molal quantities refer to the amount of a substance in a mixture per unit change in the composition of the mixture. Partial molar quantities refer to the change in the extensive properties of a solution per mole of a component added. Both terms are used to describe the behavior of components in a mixture, but they differ in the way they quantify the changes.
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How much is a molal?
A molal is a unit of concentration that represents the number of moles of solute per kilogram of solvent. It is calculated by dividing the number of moles of solute by the mass of the solvent in kilograms.
What is is the molality of 3.00 of NaCL and 1.50kg?
m = moles/kg = 3.00/1.50 = 2.00 molal
How many grams of HCl must be dissolved in 275.0 g of water to prepare a 1.5 molal solution?
The answer is 15,039 g hydrogen chloride (HCl).
How many moles of urea 60.0 g mol must be dissolved in 100.0g of water to give a 2.5 molal solution?
The answer is 15,015 g.
When you dissolve a solute into water does the boiling point go up?
Yes. This is a known colligative property and the b.p. will go up by 0.52ºC for every molal concentration of solute times the number of particles in the solute (van't Hoff factor).
How 1 molal urea solution is equal to 0.5 molal NaCl solution?
In order to compare the molality of two solutions, you need to consider the number of particles the solute separates into in a solution. Urea (CH4N2O) separates into one particle in solution, while NaCl separates into two particles. Therefore, 1 molal urea solution is equal to 0.5 molal NaCl solution because NaCl produces twice as many particles in solution as urea.
Is the molal and molar solution of NaCl the same?
yes
How much is a molal?
A molal is a unit of concentration that represents the number of moles of solute per kilogram of solvent. It is calculated by dividing the number of moles of solute by the mass of the solvent in kilograms.
Does molal elevation constant depend on nature of solvent?
No, the molal elevation constant (Kf) does not depend on the nature of the solvent. It is a constant value for a specific solvent at a given temperature and is specific to the solvent in question.
Which is more concentrated one molar NaCl or one molal NaCl?
They are equivalent. Molal is now an obsolete, not recommended term.
What is the boiling point of a 2.0 molal solution of glucose?
The boiling point is 101 oC.
What is is the molality of 3.00 of NaCL and 1.50kg?
m = moles/kg = 3.00/1.50 = 2.00 molal
What is molal depression constant?
Molal depression constant (Kf) is a colligative property constant that relates the lowering of the freezing point of a solvent to the molality of a solute in the solution. It is specific to each solvent and typically expressed in units of °C kg/mol.
What mass of Kl is contained in 2.5L of water if the solution is labeled 2 molal?
Aprox. 830 g.
What mass of KI is contained in 2.5L of water if the solution is labeled 2 molal?
Approx. 830 g potassium iodide.
What are the materials for salt water freeze?
Salt lowers the freezing point of water by the amount of molals of NaCl in the solution. 0°C - 1.86(°C / molal) (NaCl molal). This will find the new freezing point and if the energy is enough to bring salt water below this temperature and turn the solution into ice then the salt water will freeze.
What does the formula m means in science?
In science, the symbol "m" can represent various quantities depending on the context. It is commonly used to denote mass, but it can also represent other variables such as slope, meters (in units of measurement), or molality (a concentration unit).
