What is a Gran plot used for?
A Gran plot (also known as Gran titration or the Gran method) is a common means of standardizing a titrate or titrant by estimating the equivalence volume or end point in a strong acid-strong base titration or in a potentiometric titration.
What is an equivalence point in a titration?
Equivalence point: point in titration at which the amount of titrant added is just enough to completely neutralize the analyte solution. At the equivalence point in an acid-base titration, moles of base = moles of acid and the solution only contains salt and water.
What is total alkalinity in water?
Total alkalinity is a measurement of the concentration of all alkaline substances dissolved in the water that can both attract and release Hydrogen ions (H+). This interference with Hydrogen is why alkalinity buffers against change in pH.
What is the significance to calculate alkalinity?
Measuring alkalinity is important in determining a stream’s ability to neutralize acidic pollution from rainfall or wastewater. It’s one of the best measures of the sensitivity of the stream to acid inputs.
Why potentiometric titration is used?
Potentiometric titration is a laboratory method to determine the concentration of a given analyte. It is used in the characterization of acids. In this method, there is no use of a chemical indicator. Instead, the electric potential across the substance is measured.
What is difference between endpoint and equivalence point?
The main difference between equivalence and endpoint is that the equivalence point is a point where the chemical reaction comes to an end while the endpoint is the point where the colour change occurs in a system.
Why is the equivalence point important?
Since the buret allows us to determine the precise amount of base needed for neutralization, the precise concentration of the acid can be calculated. Visualizing the ‘end’ of a particular titration, specifically referred to as the endpoint or equivalence point, is essential to a successful titration.
What is difference between alkalinity and pH?
In simple terms, pH is the concentration of acid protons [H+]. On the other hand, the alkalinity of a solution is its ability to neutralize acids. Alkalinity consists of ions that incorporate acid protons into their molecules so that they are not available as a free acid that can lower the pH.
Is high pH better than low pH?
Heavy metals in water with a lower pH tend to be more toxic, as they are more available to the body. A high pH would make heavy metals less available, and, therefore, less toxic. The pH may also be a sign of other contaminants or bacterial life in a liquid.
Why calomel electrode is used?
Calomel is used as the interface between metallic mercury and a chloride solution in a saturated calomel electrode, which is used in electrochemistry to measure pH and electrical potentials in solutions.
Why KCl is used in calomel electrode?
Answer. Answer: The magnitude of a salt bridge’s junction potential is minimized by using a salt, such as KCl, for which the mobilities of the cation and anion are approximately equal. We can also minimize the magnitude of the junction potential by incorporating a high concentration of the salt in the salt ….
What is the pH at equivalence point?
At the equivalence point, the pH = 7.00 for strong acid-strong base titrations.
What is a Gran plot in chemistry?
A Gran plot (also known as Gran titration or the Gran method) is a common means of standardizing a titrate or titrant by estimating the equivalence volume or end point in a strong acid-strong base titration or in a potentiometric titration.
What does Gran mean in a blood test?
Granulocytes (GRAN), also known as ANC (Absolute Neutrophil Count). About two-thirds of your white blood cells have granules (small particles) in them. These cells are called granulocytes.
What is a Gran CBC Test?
Your Gran CBC (Granulocytes from your Complete Blood Count) is the result of a blood test that tells your doctor a number of things, including your cell count for each blood cell type, your concentrations of hemoglobin, and your gran CBC count. It’s a quick and easy procedure.
When would you use Gran’s plotting?
California State University, Fresno We wish to use Gran’s Plotting for the following titration of a weak acid with a strong base using a pH meter. Since we are doing this particular titration with a strong base, we will be titrating away the protons in the weak acid.