Question

material in the tube, ph value (0 to 14 paper), ph value (4.5 to 7.5 paper), coffee, 5, 5, milk, 7, 6.5, oven cleaner, 13, 7.5, saliva (human), 7, 6.5, shampoo, 7, 7, stomach acid, 1, 4.5, water (distilled), 7, 7. 2. analyze: compare the ph values in each column. a. how do these values compare? the ph values from 4.5 - 7.5 are more precise for substances with ph values originally within the 4.5 - 7.5 range when measured with the 0 - 14 paper. b. what is an advantage of using the 4.5 - 7.5 paper? it provides more accurate and detailed ph measurements for substances whose ph falls within the 4.5 - 7.5 range. c. what is a disadvantage of using the 4.5 - 7.5 paper?

Explanation:

A. The 4.5 - 7.5 paper gives more precise values for substances in that pH range when compared to the 0 - 14 paper.
B. It offers more accurate and detailed pH readings for substances with pH in the 4.5 - 7.5 range.
C. A disadvantage is that it can only measure substances within the 4.5 - 7.5 pH range and is not suitable for substances with pH values outside this range, like oven cleaner (pH = 13) or stomach acid (pH = 1) which require the 0 - 14 paper for measurement.

Answer:

A. The pH values from 4.5 - 7.5 are more precise for substances with pH values originally within the 4.5 - 7.5 range when measured with the 0 - 14 paper.
B. It provides more accurate and detailed pH measurements for substances whose pH falls within the 4.5 - 7.5 range.
C. It can only measure substances within the 4.5 - 7.5 pH range and is not suitable for substances with pH values outside this range.