what is the equation for calculating ph?
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To calculate the pH of an aqueous solution you need to know the concentration of the hydronium ion in moles per liter (molarity). The pH is then calculated using the expression: pH = - log [H3O+].
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Knowing that NaNO2 is the salt of a strong base and weak acid calculate... a: pH of 0.100 M NaNO2 solution. Ka of HNO2 = 4.6 x 10-4.
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People confuse pH vs. alkalinity and we can understand why. Just remember that pH is an equilibrium that functions like a scale measuring how acidic or how basic a substance is. Total alkalinity measures the amount or concentration (in parts per million) of dissolved bicarbonate, carbonate and hydroxide ions.
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To convert from dKH alkalinity to ppm, multiply the result by 17.86. To convert from ppm to meq/L, multiply by 0.358.
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pH scale is a range of numbers given by working out -log[H+] for a given solution. It ranges from 14 to about -2. Universal indicator is a mixture of solutions that change colour depending on the value of the pH. Red indicates pH up to 2–4, orange from 3–6, green where pH=7, blue for 8–11 and purple for 11–14.
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Since pH is defined as the negative log of the hydrogen ion concentration, the pH of pure water is 7 or neutral. Pure water is neutral because the number of positive hydrogen ions produced is equal to the number of negative. Why is water neutral? The amount of H+ ions in a solution.
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KOH is a strong base, KOH → K+ + OH-, and therefore dissociates completely into negative (they hydroxide ion, OH-) and positive ions in water solution. pH 8.35 is a high pH (> 7), therefore this is a basic solution. 4. Calculate the pH of 735 liters of a solution containing 0.34 moles of nitric acid (HNO3).
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Hydrogen ion concentration is more conveniently expressed as pH, which is the logarithm of the reciprocal of the hydrogen ion concentration in gram moles per liter. Thus, in a neutral solution the hydrogen ion (H+) and the hydroxyl ion (OH−) concentrations are equal, and each is equal to 10−7. A pH of 7 is neutral.
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If the solution pH is 3.85, what percentage of the acid is dissociated? Percent dissociation is therefore given by 1.413 x 10-4 ÷ 0.0011375 = 0.1242 = 12.42%.
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(Acids have a pH below 7, while bases have a pH above 7. A neutral solution has a pH of 7. The lower the pH, the more acidic the substance. A substance's pH is related to the balance of H+ (hydrogen) ions and OH- (hydroxide) ions.
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pH refers to the potential of Hydrogen ions in your water, which will determine if your water is too acidic or has too much alkaline in it. PPM (parts per million) refers to the concentration of minerals and soluble matter in your watering solution.
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In Summary: Buffers, pH, Acids, and Bases A solution with a high number of hydroxide ions is basic and has a high pH value. The pH scale ranges from 0 to 14, with a pH of 7 being neutral. Buffers are solutions that moderate pH changes when an acid or base is added to the buffer system.
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The equation for calculating Molarity from the moles and volume is very simple. Just divide moles of solute by volume of solution.
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Scientific definitions for ph pH. [ pē′āch′ ] A numerical measure of the acidity or alkalinity of a solution, usually measured on a scale of 0 to 14. Neutral solutions (such as pure water) have a pH of 7, acidic solutions have a pH lower than 7, and alkaline solutions have a pH higher than 7.
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The empirical formula of P4O10 is P2O5 . We get it by dividing both subscripts by 2 .
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['Write the equation used to calculate the weight/volume (%) : weight/volume (%) = (mass solute ÷ volume of solution) × 100.', 'Identify the solute: solute = sodium chloride = NaCl.', 'Extract the data from the question: mass solute (NaCl) = 5 g.']
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A solution of 0.8 mol/dm 3 hydrochloric acid has a pH of 0.1. Predict its pH when it is diluted to 0.08 mol/dm 3. The hydrogen ion concentration decreases by a factor of 10, so the pH increases by 1 from 0.1 to 1.1.