Based on the diagram below, answer the following for 2 points each: +
-
.
• Use the size and direction of the "energy arrows" to explain whether this
illustration is an exothermic or endothermic reaction.
Explain in terms of atomic bonds how energy is involved in chemical reactions.
Explain how the arrows would be different if the reaction were the other of
the two choices in part one.

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent

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