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 two pH readings 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 of the three measurements is between 8.2 and 8.5. if the first two pH reading are 8,48 and 8,35, find the range of pH of the third reading that will result in acidity level being normal.

An aqueous solution has a pH value of 7 . is this solution is acidic, basic or neutral .

You are given three solutions A,B and C. the pH values of the solutions are 4.5, 7.0 and 10.0 respectively? Which of these is acidic?

When pure ammonium chloride is dissolved in pure water, the pH of the resulting not 7. This is because :

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.

The sum of three numbers-is 6. If we multiply the third number by 2 and add the first number to the result, use get 7. By adding second and third number to three times the first number, we get 12. Using matrices, find the numbers.

The pH value of three acidic solutions having equal molar concentrations are Vinegar=3.2, Coca cola=5.90, Beer=4.8 Arrange these acids in order of increasing acid strength.

Baking soda is used in small amount in making bread and cake. It helps to make this soft and spongy and aqua solution of baking soda turns red litmus blue. It is also used in Soda acid fire extinguisher. Use this information to answer the following questions Is the pH value of baking soda solution lesser than or greater than 7?

These questions consist of two statements each,printed as Assertion and Reason.While asnwering these questions you are required to chose any one of the following four responses. If both Assertion and Reason are true and Reason in correct explanation of Assertion. If both assertion and Reason are true but reason is not correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Assertion:When CO_2 concentration of atmosphere increases,stomata close partially. Reason: CO_2 combines with water to form carbonic acid which lowers pH value and stomata close.