when do you use the van't hoff factor
van 't Hoff factor The van&nbsp't Hoff factor i (named after Dutch chemist Jacobus Henricus van 't Hoff) is a measure of the effect of a solute upon colligative properties such as osmotic pressure, relative lowering in vapor pressure, boiling-point elevation and freezing-point depression. The van 't Hoff factor is the ratio between the actual concentration of particles produced when the substance is dissolved and the concentration of a substance as calculated from its mass. For most non-electrolytes dissolved in water, the van 't Hoff factor is essentially 1. For most ionic compounds dissolved in water, the van 't Hoff factor is equal to the number of discrete ions in a formula unit of the substance. This is true for ideal solutions only, as occasionally ion pairing occurs in solution. At a given instant a small percentage of the ions are paired and count as a single particle. Ion pairing occurs to some extent in all electrolyte solutions. This causes the measured van 't Hoff factor to be less than that predicted in an ideal solution. The deviation for the van 't Hoff factor tends to be greatest where the ions have multiple charges.
H.R. Pufnstuf The Krofft brothers have responded in several interviews to popular beliefs that subtle recreational drug references exist in the show.[19][20][21] For example, the title character's name Pufnstuf has been interpreted as a reference to smoking hand-rolled (H.R.) marijuana (puffin' stuff);[19][20][21][22][23][24] Marty Krofft has said the initials H.R. actually stand for "Royal Highness" backwards.[23][24] The show's theme song lyric "he can't do a little, 'cause he can't do enough" has been read as referring to the addictive nature of drugs. Pufnstuf has quotes like "Whoa, dude!" and other "hippie" slang words. Lennie Weinrib, the show's head writer and the voice of Pufnstuf, has said, "I think fans gave it a kind of mysterious code-like meaning, like ‘Ah, was Pufnstuf puffing stuff? Like grass?’ Was it psychedelic? Was it drug oriented? Not to us, it wasn’t."[25][26] In a 2000 interview, Marty Krofft answered the question by saying, "The Krofft look has a lot of color, but there were no drug connotations in the show." He addressed the topic at length in an interview with the St. Louis Post-Dispatch in 2004, in response to the question, "OK, let's get this right out in the open. Is H.R. Pufnstuf just one giant drug reference?":