Be sure to answer all parts. tris [tris(hydroxymethyl)aminomethane] is a common buffer for studying biological systems. (ka = 5.01 × 10−9 and pka = 8.3) (a) calculate the ph of the tris buffer after mixing 10.0 ml of 0.15 m hcl solution with 25.0 ml of 0.10 m tris. (b) this buffer was used to study an enzyme-catalyzed reaction. as a result of the reaction, 0.00015 mol of h+ was produced. what is the ph of the buffer at the end of the reaction? (c) what would be the final ph if no buffer were present?

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

gas

explanation:

smoke is the matter of a gas