Explain why it is best not to pipe ya liquid directly from a reagant bottle

Possibility of contamination

Explanation:

Taking a sample with a pipette from a reagent bottle directly might contaminate the entire solution. For example, if a pipette is not clean enough, any salt present will therefore dissolve in the given solution and change its purity. In worse cases, that salt might also react with the given solution and produce new products.

Another example is when a clean pipette is used but isn't dry. The resultant water will essentially dilute the solution and will change its molarity. If that solution needs to have an exact standardized molarity, the reading will then not correspond to its actual concentration and such a solution couldn't be used for a titration and would have to be standardized.

odds are decent that your handwriting right now looks a little bit different than it did five years ago, and will look different again in five more. when i look back through my notebooks from middle school to now, i see a long, slow progression from meticulous and teeny letters to bigger, sloppier ones, plus a few side detours: sometime in high school, for example, i decided those loopy cursive lowercase f’s were just the coolest, adopting them as the lone rep for cursive in my otherwise all-print handwriting.

explanation:

43.452

step-by-step explanation:

284 times .153 = 43.452