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21 lip 2020 · To calculate pH, take the log of the hydrogen ion concentration and change the sign of the answer. In chemistry, pH is a number that acidity or basicity (alkalinity) of an aqueous solution. The pH scale normally runs from 0 to 14. A pH value of 7 is neutral.
- Significant Figures
For example, the zero in 4.320 is the least significant...
- Negative pH is Possible
One place to find negative pH is in the water from metal...
- pH Scale
The pH scale shows how acidic or basic a chemical is in...
- Aqueous Solution
An aqueous solution contains water as the solvent. Examples...
- Dissociate
In chemistry, dissociation is a chemical reaction where a...
- pH, pKa, Ka, pKb, and Kb in Chemistry
A small pKb value indicates a strong base, while a large pKb...
- Concentration Units For Solutions
Note it is essentially the same as the molarity equation...
- Scientific Notation
Large numbers always have positive exponents. For example:...
- Significant Figures
Explore our collection of Grade 8 Science worksheets on the PH scale and indicators. Learn about acidity, alkalinity, and how indicators help determine the pH of substances. These resources are designed to enhance your understanding of this essential topic in the science curriculum.
You can create printable tests and worksheets from these Grade 8 Acids and Bases questions! Select one or more questions using the checkboxes above each question. Then click the add selected questions to a test button before moving to another page.
pH is a measure of how acidic or basic a substance is. It takes a numerical value between 0 and 14 that measures the relative amount of free hydrogen and hydroxyl ions in water. Water having more hydrogen ion concentration than hydroxyl is acidic.
A pH scale is an important tool for differentiating the acidic and alkaline products, depending on the colour change that varies according to the different pH values. The intensity of the acidic products increase as the pH decreases from 6 to 0, i.e. lower is the pH value higher will be the acidity. In contrast, the intensity of the alkaline ...
What the equation means is just what we said before: for each 1-unit change in pH, the hydrogen ion concentration changes ten-fold. Pure water has a neutral pH of 7. pH values lower than 7 are acidic, and pH values higher than 7 are alkaline (basic).
Visualize the relative number of hydroxide ions and hydronium ions in solution. Switch between logarithmic and linear scales. Investigate whether changing the volume or diluting with water affects the pH. Or you can design your own liquid!
