What is W W and V V?
What is W W and V V?
This fact sheet briefly describes the difference between three common percent concentration expressions, weight per weight (w/w), weight per volume (w/v) and volume per volume (v/v). This expression is commonly used when the solute is measured by volume before being added to the solution.
What is W W in chemistry?
(chemistry) “weight for weight” or “weight by weight”, the proportion of a particular substance within a mixture, as measured by weight or mass. Water Content: 10 g/kg max (1% w/w)
What does 2% w/w mean?
2% w / w solution means grams of solute is dissolved in 100 grams of solution. Weight / volume % 4% w / v solution means 4 grams of solute is dissolved in 100 ml of solution. Volume / weight % 3% v/ w solution means 3 ml of solute is dissolved in 100 grams of solution.
What does w/w solution mean?
Weight concentration
Weight concentration of a solution is expressed as % w/w. Like before, this stands for weight per weight. So, if the total mass of a 100g solution is made up of 30g hydrochloric acid in 70g of water, then we would express this as hydrochloric acid 30% w/w.
How do you convert VV to WW?
To convert v/v to w/w, you have to multiply by the density of the solute and divide by the density of the solution.
How do you calculate WW?
%w/w concentrations – example: If you were making 100 g of your product and add 50 ml of the oil during manufacture, this will be 50 x 0.9 g/ml = 45 g. Therefore, in 100g of your product’s solution, 45 g of this will be your oil, meaning that it has a %w/w of 45.000.
How do I calculate WW?
What is N in chemistry?
Normality in chemistry is one of the expressions used to measure the concentration of a solution. It is abbreviated as ‘N’ and is sometimes referred to as the equivalent concentration of a solution.
How do you make 2% HCl?
- 1M HCl: add 1mol/12M = 83 ml conc. HCl to 1L of water or 8.3ml to 100ml.
- 2M HCl: add 2mol/12M = 167 ml conc. HCl to 1L of water or 16.7ml to 100ml.
What does 0.1 mean?
0.1% w/v. That means that, for every 100 mL you have 0.1 g. 500 mL. That is the total volume specified. At the quoted concentration then it contains 0.5 g, or 500 mg, of whatever it is that we are talking about.
How do you convert wt% to volume?
So if you want to convert wt% into vol% you must know the density of the substance because, weight = volume x density of the substance x gravitational constant. (That is the relationship between weight and volume of anything).
Is VV equal to WW?
Example: when 52 ml pure ethanol is mixed with 48 ml of water a volume of 96.3 ml is obtained instead of 100 ml….Ethanol concentration table: what is the percentage by volume or weight?
| Concentration of ethanol by weight (w/w) | Concentration of ethanol by volume (v/v) |
|---|---|
| 61.0% (w/w) | 68.7% (v/v) |
| 62.4% (w/w) | 70.0% (v/v) |
| 65.0% (w/w) | 72.4% (v/v) |
| 70.0% (w/w) | 77.0% (v/v) |
