Difference between
1-precision and accuracy
2- Molarity and molality
Answers
Answer:
What is the Difference Between Accuracy and Precision? Accuracy and precision are alike only in the fact that they both refer to the quality of measurement, but they are very different indicators of measurement. Accuracy is the degree of closeness to true value. Precision is the degree to which an instrument or process will repeat the same value.
Explanation:
Molarity vs Molality: Formula and Definitions | Technology Networks Molarity is the ratio of the moles of a solute to the total liters of a solution. The solution includes both the solute and the solvent. Molality, on the other hand, is the ratio of the moles of a solute to the kilograms of a solvent.
Answer:
Molarity can be defined as the number of moles of a substance (known as the solute) that is dissolved in precisely 1 liter of a solution (solvent and solute combined).
The formula for calculating molarity is therefore as follows:
M = mole solute / L solution
Molarity is also commonly referred to as molar concentration. Therefore a measure of molar concentration based on the volume of liquid that a substance is dissolved in. It is important to realize that the volume is in liters so you may have to convert first if you have volume in ml for example.
To prepare a molar concentration one adds a known quantity of solute to a volumetric flask then fills up the flask with liquid until the 1 liter mark is achieved.
Difference between Molarity and Molality 1
For example: one can make up a certain molar concentration of sugar. The weight of the sugar first has to be converted to moles and then the water is added until 1 liter is reached.
To calculate molarity you need the solute in moles, but usually you will have a certain weight of solute which means you first need to convert the grams into moles. This can be done by finding the molar mass of the solute from the periodic table.