Chemistry, 17.11.2019 09:31 sloansters9315
Based on the definition of logarithms, what is the difference in hydrogen ion concentration between a substance with a ph of 2 and a substance with a ph of 3?
Answers: 3
Chemistry, 22.06.2019 02:30
List four observations that indicate that a chemical reaction may be taking place
Answers: 1
Chemistry, 22.06.2019 08:00
Straightforward questions answered in the powerpoint slidesreaction: heating the starting materials under refluxwhat does it mean to heat under reflux? why do we choose water as the reflux solvent? what are boiling chips used for? why do we put a condenser on top of the reaction? why do we add heat and let the reaction stir for 30 minutes? why do we add sulfuric acid to the reaction after it cools as opposed to when it’s still hot? separation: filtration of precipitatewhy don’t we do an aqueous and organic extraction in the separatory funnel? why do you rinse the salicylic acid on the filter with ice cold water? purification: recrystallization of salicylic acid (no hot filtration needed)what is the difference in the amount of room temperature water vs. boiling water needed to dissolve the salicylic acid (assume a 1.2 gram yield of salicylic acid)? remember, in the lab if you need x ml of boiling water to dissolve a solid, then you should add a little more (definitely no more than 1.5 times the theoretical amount) to ensure it doesn’t recrystallize prematurely.analysis: melting point of salicylic acidwhat can you conclude if the melting point of the salicylic acid you just synthesized is 152-155oc and the 1: 1 mix of your product and “synthetic” salicylic acid is 151-154oc?
Answers: 1
Chemistry, 22.06.2019 13:00
What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?
Answers: 2
Chemistry, 22.06.2019 13:50
Abeaker with 2.00Ă—102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.
Answers: 1
Based on the definition of logarithms, what is the difference in hydrogen ion concentration between...
Mathematics, 20.11.2020 22:10
Arts, 20.11.2020 22:10
English, 20.11.2020 22:10
Mathematics, 20.11.2020 22:10
Mathematics, 20.11.2020 22:10
Mathematics, 20.11.2020 22:10
Mathematics, 20.11.2020 22:10
Spanish, 20.11.2020 22:10
History, 20.11.2020 22:10
Mathematics, 20.11.2020 22:10
Biology, 20.11.2020 22:10
Mathematics, 20.11.2020 22:10
Mathematics, 20.11.2020 22:10