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In this video,I have explained Pressure Enthalpy ( P-H)Diagram.i explained basic line in PH diagram. how to draw all lines. why lines is drawn by this specif.
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pH is a representation of hydrogen ion activity in a liquid. It is the negative logarithm of the number of hydrogen ions (in moles) per liter of liquid. Thus: 10 -11 moles of hydrogen ions in 1 liter of liquid = 11 pH. 10 -5.3 moles of hydrogen ions in 1 liter of liquid = 5.3 pH. The basic pH scale extends from 0 (strong acid) to 7 (neutral.
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In electrochemistry, and more generally in solution chemistry, a Pourbaix diagram, also known as a potential/pH diagram, EH-pH diagram or a pE/pH diagram, is a plot of possible thermodynamically stable phases ( i.e., at chemical equilibrium) of an aqueous electrochemical system.
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Eh-pH diagram, any of a class of diagrams that illustrate the fields of stability of mineral or chemical species in terms of the activity of hydrogen ions (pH) and the activity of electrons (Eh).
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log p-h Diagram Select Refrigerant R134A Define State Cycle Select. | DE log (p)-h chart undefined Show / Hide Info Isotherms Isovapors Isochors Isentropes Vapor Dome The log ph diagram for different refrigerants, including R134a, CO2 (R744) and R1234yf. use online interactive. Test now!
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A unit of measure that measures the acidity or alkalinity of a solution using a logarithmic scale with seven as neutral, where lower values are more acidic, and higher ones are more alkaline, is known as pH. The pH equals negative log10 of the hydrogen ion concentration (c), given in moles per liter (c). pH = -log 10 [H+]
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The log-C vs. pH diagram is constructed as s superposition of plots for each conjugate pair at its respective pKa. Note especially that the pH of a solution of glycine does lie exactly at the crossing point [Gly - ] = [H + ], but is slightly displaced from it according to the proton balance equation shown in the inset on the graph.
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Figure 12. Example of a detailed conceptual model diagram for Low pH. Click on the diagram to view a larger version. pH is a measure of hydrogen ion concentration in an aqueous solution. pH decreases as hydrogen ion concentration increases, and these acidic conditions can adversely affect aquatic biota.
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This diagram describes the relationship of pressure and enthalpy of a select refrigerant. In order to properly understand this diagram, it is best to go through the vapor compression cycle on a P-H diagram. Understanding the P-H Diagram On the P-H diagram, pressure is indicated on the y-axis and enthalpy is indicated on the x-axis.
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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. This is the pH of pure water. Values less than 7 are acidic, while those greater than 7.
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In chemistry, pH (/ p iห ห eษช tส / pee-AYCH), also referred to as acidity or basicity, historically denotes "potential of hydrogen" (or "power of hydrogen"). It is a scale used to specify the acidity or basicity of an aqueous solution.Acidic solutions (solutions with higher concentrations of hydrogen (H +) ions) are measured to have lower pH values than basic or alkaline solutions.
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The diagram below shows what happens to pH when a strong base is slowly added to a weak acid: Drawing pH Curves . 1. The starting pH is higher. As the acid is weak, it starts at a higher pH compared to a strong acid. 2. Initially the pH rises fast. At the start there is a rapid change in pH with a small amount of OH- ions added.
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The pH scale. How acidic or alkaline a substance is (the pH of the substance) can be measured using the pH scale, a continuous range that stretches from below 0 to above 14. Most common pH values.
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To give you the short answer: An acidic solution has a high concentration of hydrogen ions (H + ), greater than that of pure water. A basic solution has a low H + concentration, less than that of pure water. To see where this definition comes from, let's look at the acid-base properties of water itself. Autoionization of water
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As noted above, these diagrams are essentially phase diagrams that map the conditions of potential and pH (most typically in aqueous solutions) where different redox species are stable. We saw a simple example of such a diagram in section 4.2 for H 2 O. Typically, the water redox reactions are plotted as dotted lines on these more complicated diagrams for other elements.
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KS3 The pH scale Part of Chemistry Acids and alkalis Remove from My Bitesize Key points The pH scale shows how acidic a substance is. It can be measured using a pH meter which gives a.