Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: (1) The most abundant ion in hard water is usually Na⁺.
(2) Fresh water purified for drinking purposes contains no ions.
(3) Tooth enamel contains both monatomic and polyatomic ions.

Question

Quizplus · Accepted Answer

1) False - The most abundant ions in hard water are usually calcium (Ca2+) and magnesium (Mg2+), not sodium (Na+). 2) False - Fresh water purified for drinking still contains ions, albeit in lower concentrations. It is not completely ion-free. 3) True - Tooth enamel contains both monatomic ions (such as calcium) and polyatomic ions (such as phosphate in hydroxyapatite).

Characterize EACH of the Three Given Statements as Being TRUE