Ca(oh)2 is added to a large beaker. how is the solution different from the original water?
a. the solution turns blue litmus to red
b. the solution turns phenolphthalein pink
c. the solution has more hydrogen ions
d. the solution has fewer hydroxide ions

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?

Which of these is a density dependent factor? a. epidemic b. earthquake c. drought d. hurricane

When the ionic compound nabr dissolves in water, br– ions are pulled into solution by the attraction between what two particles? a. the na+ and br– ions b. the na+ ion and the negative end of a water molecule c. the br– ion and the positive end of a water molecule d. the br– ion and the negative end of a water molecule