Pick one or more of the following combinations to investigate in this activity.
vinegar and baking soda (nahco3)
room temperature water and powdered washing soda (na2co3)
vinegar and table salt (nacl)
what chemical combination did you investigate?
did the observed temperature of the solution increase or decrease?
based on your observation, was the reaction endothermic or exothermic? explain your answer using complete sentences.
describe in detail the relationship between chemical bonds and energy. what must be true of the bonds for a reaction to be endothermic and what must be true for the reaction to be exothermic?

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?

When balancing a chemical equation:

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.