Why is the pH meter when calibrated correctly better at measuring pH than the pH paper?

Answer 1

pH strips/paper are a fast, accurate, and reproducible means to pH solutions and

would virtually eliminate this type of situation.

or turbid samples all you

have to do is dip the strip, rinse and read. They

In addition, EM ColorpHast strips work in colored

REMOVE many sources of error

in colorimetric pH measurement

.

Answer 2

Depends on what it being used for. A pH meter is far more accurate than pH paper. A good pH meter is accurate to 0.01 pH units. The best pH paper is only accurate to about 0.2 pH units. On the other hand a pH meter needs to calibrated daily and takes a bit of skill to maintain and use whereas pH paper take little skill and needs no calibration. A good pH meter costs around $1000 and needs a new probe every 2-5 years depending on how well it has been taken care of at a cost of $250. As well as that it needs calibration buffers at a cost of $50-100 a year. pH paper is cheap it only costs $20 or so for a hundred tests. IF you are testing soil or swimmimng pool water then pH paper is fine. If you are working in a lab then you need a pH meter.

Answer 3

A pH meter gives a more accurate pH value.

Answer 4

With correct calibration, pH meters do indeed give more precise readings of pH than most indicator papers.

Answer 5

Because it uses the change in current in a battery-powered circuit to determine the pH level. This is far more accurate than using indicator papers.

Answer 6

The pH meter is an electronic and calibrated instrument.

Answer 7

The pH paper is only a visual evaluation; the pH meter is an electronic instrument.

Answer 8

pH meter is more accurate!