18. Let’s consider calcium hydroxide, Ca(OH)2 which has Ksp = 5.02 x 10–6 . a. What is the pH of a saturated solution of Ca(OH)2 in water at 25 o C? b. Is Ca(OH)2(s) more soluble in acidic or basic solutions? Briefly explain your reasoning. c. Let’s say you have a 0.5M aqueous solution of CaCl2. What concentration of hydroxide (OH– ) is needed to begin precipitation of Ca(OH)2(s) at 25o C? d. If you have an aqueous solution with a pH buffered at 11.4, what concentration of Ca2+(aq) is needed to begin precipitation of Ca(OH)2 (s) at 25o C?

- decrease the number of plants and animals living in the water.

the volume increases

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them  

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.