What do the elements in Group 17 have in common? A. They rarely react with any other elements.
B. They tend to form ions with a -1 electric charge.
C. They are all found in nature in their pure forms.
D. They tend to form ions with a +1 electric charge.

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.