Presentation on theme: "Lecture 13 Chemical sensors. 2 of 17 pH sensor pH indicates how acidic or alkaline a solution is pH term translates the values of the hydrogen ion concentration."— Presentation transcript:
2 of 17 pH sensor pH indicates how acidic or alkaline a solution is pH term translates the values of the hydrogen ion concentration Solutions with pH 7 alkaline (basic), pH = 7 is said to be neutral.
3 of 17 pH sensor pH is defined as the negative logarithmic value of the Hydrogen ion (H+) concentration pH Ion Concentration (gram equivalent per liter) Type of Solution 01.0 Acid Solution - Hydrogen ions - H + 10.1 20.01 30.001 40.0001 50.00001 60.000001 70.0000001Neutral Solution 80.000001 Basic (alkaline) Solution - Hydroxide ions - OH - 90.00001 100.0001 110.001 120.01 130.1 141.0
4 of 17 Examples of substances ProductpH Battery Acid0 HCl in stomach acid1 Lemon juice, vinegar2-3 Orange juice3-4 Acid rain4 Black coffee5 Urine, salvia6 Pure water7 Sea water8 Baking soda9 Ammonia solution10-11 Soapy water12 Bleach13 Oven cleaner13-14 Drain cleaner14