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What happens if you mix bromphenol blue and NaOH?
When bromophenol blue is mixed with NaOH, the solution turns blue because the pH becomes alkaline. Bromophenol blue is a pH indicator that changes color in different pH ranges. In the presence of NaOH, which is a base, the bromophenol blue changes from yellow (at acidic pH) to blue (at alkaline pH).
What is the relationship between alkalinity and pH in water quality testing?
In water quality testing, alkalinity and pH are related but measure different things. pH measures the acidity or basicity of water, while alkalinity measures the water's ability to resist changes in pH. A higher alkalinity level can help buffer changes in pH, making the water more stable.
What is the name of the indicator that gives you the range of colours for different pH numbers?
The indicator that gives you the range of colors for different pH numbers is called universal indicator. It is a mixture of several indicators that changes color over a wide pH range.
How does lipstick change with pH levels?
Lipstick changes color with pH levels because of the chemical reactions between the lipstick pigments and the acidity of the skin. The pH level of the skin can alter the color of the lipstick, causing it to appear different shades on different people.
How does behaviour of EBT changes with changes in pH?
The behavior of EBT (Eriochrome Black T) changes with changes in pH because this indicator undergoes different color changes depending on the acidity or basicity of the solution. At lower pH levels, EBT appears red, while at higher pH levels it transitions to blue. This color change can be used to determine the endpoint of acid-base titrations.
What will lowering the pH of a medium do to the angle of refraction of light?
Lowering the pH of a medium, such as a liquid, will not have a direct effect on the angle of refraction of light. The angle of refraction of light is primarily determined by the refractive index of the medium, which is not inherently influenced by pH changes. However, extreme changes in pH may induce changes in the optical properties of the medium, potentially leading to alterations in the refraction of light.
What changes the pH levels of soaps?
The pH depends on the ingredients.
What is the chemical used to identify changes in pH?
The chemical commonly used to identify changes in pH is an indicator, such as litmus paper or phenolphthalein. These indicators change color in response to changes in the acidity or alkalinity of a solution, allowing for easy visual detection of pH changes.
Why use different buffers for a range of ph?
Different buffers are used for different pH ranges to maintain a stable pH environment for experiments or reactions. Each buffer has an optimal pH range at which it is most effective in resisting changes in pH. Using the appropriate buffer ensures that the desired pH is maintained and prevents shifts that could affect the results or outcomes of the experiment.
What name is given to substance that resist changes in pH?
A substance which resists changes in pH is called a buffer.
Why can't a single indicator be used to tell the pH of a solution?
A single indicator cannot be used to accurately determine the pH of a solution because indicators change color over a range of pH values rather than at a specific pH. Different indicators have varying color changes at different pH ranges, so using multiple indicators or pH meters provides a more precise measure of the pH of a solution.
Is thymol blue and brothymol blue the same?
Yes, thymol blue and bromothymol blue are two different pH indicators. Thymol blue has a pH range of 8.0-9.6 and changes color from yellow to blue, while bromothymol blue has a pH range of 6.0-7.6 and changes color from yellow to blue.
