Chemistry, 01.09.2019 00:10, ariannayazmin052509
Why do you think scientists add excess of one or more chemicals when performing a reaction rather than combine the exact stoichiometric ratio?
Answers: 1
Chemistry, 21.06.2019 22:30, kingteron5870
Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?
Answers: 1
Chemistry, 22.06.2019 03:40, 19thomasar
Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) â pcl3(g) + cl2(g)
Answers: 3
Chemistry, 22.06.2019 06:00, josmanu235
Why is permeable soil best for plants that need a lot of drainage?
Answers: 1
Chemistry, 22.06.2019 08:00, katelyn0579
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 itâs still hot? separation: filtration of precipitatewhy donât 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 doesnât 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 âsyntheticâ salicylic acid is 151-154oc?
Answers: 1
Why do you think scientists add excess of one or more chemicals when performing a reaction rather th...
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