Why do you think that KCl can be used as an effective water softener and also as a drug to kill someone? What is the difference between the two solutions? please I'm failing this class

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

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions

Why do lunar and solar eclipse not happen every month