The water acidity in a pool is considered normal when the average pH reading of three daily measurements is between 7.2 and 7.8. If the first tow pH reading are 7.48 and 7.85, find the range of pH value for  the third reading that will result in the acidity level being normal.

The water acidity in a pool is considered normal when the average pH reading of three daily measurements is between 8.2 and 8.5 If the first two pH readings are 8.48 and 8.35 , then find the range of pH value for the third reading that will result in the acidity level being normal.

The pH of the digestive juices within the human small intestine is between 7.5 and 8.5. This environment is slighly

There are three containers of equal capacity and all are completely filled with mixtures of acid and water in different ratios. The ratio of acid to water in the first container is 2 : 3, in the second container the ratio is 3:7 and in the third container it is 4:11. If the mixtures of all the three containers are mixed together, what will be the ratio of acid to water in it?

For pure water (pH=7), K_(w) at 298 is 10^(-14) . On adding some acid to it, its pH changes to 3. The value of K_(w) for this acidicfied water will be

Three normals are drawn from the point (7, 14) to the parabola x^2-8x-16 y=0 . Find the coordinates of the feet of the normals.

Will the given solution be acidic or alkaline if its pH value is less than 7 ?

When the following amino acids are separated by running them on Agraose gel at pH 7, which one then will migrate slowest to anode ends ?

Three normals are drawn from the point (14,7) to the curve y^2-16x-8y=0 . Find the coordinates of the feet of the normals.

Internal micrometer is a measuring intrument used to measure internal diameter (ID) of a large cylinder bore with high accuracy. Construction is shown in figure. There is one fixed rod B (to the right in figure) and one moved rod A (to the left in figure). It is based on the particle of advancement of a screw when it is rotated in a nut with internal threads. Main scale reading can be directly seen on the hub which is fixed with respect to rod B. When the cap is rotated rod A moves in or cut depending on direction of rotation. The circular scale reading is seen by checking which division of circular scale coincide with the references line This is to be multiplied by LC to get circular scale reading. Least count = value of 1 circular scale division = ("pitch")/("number of division on circular scale") Length of rod A is chosen to match the ID(PQ) to be measured. Zero error is checked by taking reading between standard blocks fixed at normal value of ID to be measured. Zero error is positive if cap end is one the right of the main scale and negative it is on the left side. In the above instrument, while measuring an internal diameter. ID is set of 321 mm with no zero error. It cap end is after 7^(th) division adn 17^(th) division of main scale coincides with the reference line, the ID is -

The pH values of three solutions A, B and C are given. Solution A: ph value 12, Solution B: ph value 2, Solution C, pH value 7. Answer the following questions Which solution will trun red litmus solution blue