Question

COMPLETE:
________________ is a scale used to determine the approximate pH of a solution.

Answer 1

Construct an angle of 45° at the initial point of a given ray and justify the construction. ... Taking O as centre and some radius, draw an arc of a circle, which intersects OA, say at a point B. 2. Taking B as centre and with the same radius as before, draw an arc intersecting the previously drawn arc, say at a point C.