Always true, AT; sometimes true, ST; or never true, NT?

Question

Normally, the actual yield in a chemical reaction will be equal to or less than the theoretical yield.

Answer 1

sometimes true
nuclear reaction it is less than matery, it is lost in radiation.

Answer 2

NT. The actual yield will never equal the theoretical yield, unless you were some kind of super freaky good chemist, and thats even then. The yield will typically be a little less than the theoretical yield b/c of human error, impurities, uncontrollabe factors, etc.

Unless you can hit about 97-99% yields, then aldridge (the chemical company) will come looking for you and offer you a 100k/yr job. This is not typical in a typical lab - only professional laboratories with very immaculate equipments can obtain such results. A typical yield, say in a university/college laboratory would be something more like 50-70 percent yields off the theoretical value.

Answer 3

The actually yield is always less than the theoretical yield. Phillip R had a pretty good answer, but more correctly, all chemical reactions have an equilibrium constant that relates reactants to products. Since there will always be some amount of conversion to starting material, a true 100% yield can never be achieved. However, for all practical purposes, in industry a >95% yield is considered to be "quantitative."

Steve Geo1, WTF??? Quantitative analysis has nothing to do w/ synthesis. It's a method of calculating how much of an analyte is present.

Answer 4

AT, Always True. Quantitative analysis depends upon one's always getting the theoretical amount, +/- some small human error. Even in some organic reactions, the yield can be quantitative. And in any reaction, one can always get less than theoretical LOL.

Answer 5

ST - guessing!