# The Calculation of Temperature in Osmotic Pressure

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The calculation of temperature in osmotic pressure requires you to pay close attention to a few key things. Find out about the calculation of temperature in osmotic pressure with help from an experienced chemistry professional in this free video clip.

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## Video Transcript

Hi, I'm Dan Weisenberger and this is the calculation of temperature from osmotic pressure. So, let's start by talking about osmosis. How do we define it? Well, osmosis is described in this graphic here, in which we have a U-shaped tube with water that's at equal levels on both sides. And these two halves of the tube are separated by a semi permeable membrane. Which will allow water to go between the two halves but not any material. So, if we add sugar or any kind of solute to it, but we put more on one side than on the other. What happens for osmosis is that more water will go from the left side into the right side. And increase the volume of this right side in order to make the concentrations of the two sides equal. And the osmotic pressure then is the amount of pressure that we put onto a liquid in order to prevent net water from moving across the membrane. And thereby we will keep the solution in equilibrium. So, how do we calculate osmotic pressure? The equation for osmotic pressure is shown here where it equals IMRT, where I is the Van't Hoff. And this is a measure of the concentration of the solute in solution compared to what it's calculated as. So, if it's something like sugar, this is a value of one. If it's something that's an ionic salt, for instance that it's the measure of the concentration of the total ions in that compound over what is expected mathematically. M is the molarity that's in moles per liters. And R is the universal gas constant, zero point zero eight two O six. Temperature is the temperature in Kelvin. So if we want to calculate temperature, temperature will equal I, the Pi over IMR, yes. And I'm Dan Weisenberger and this is the calculation of temperature from osmosis.

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