Key Difference - pH vs pOH
of solute pH refers to the “potential of hydrogen” It can be used to determine whether a solution is acidic, basic or neutral In contrast, pOH is a measure of hydroxide ion (OH-) concentration The key difference between pH and pOH is that pH is a measure of hydrogen ions whereas pOH is a measure of hydroxide ions What is pH?
Chemistry of Iron in Natural Water
9 artificial solutions containing from about 12 to about 26 ppm of ferrous iron at pH 5 8 to 6 7, lost iron by oxidation and precipitation of ferric hydroxide at a rate governed by the diffusion of oxygen through the water An aliquot of the natural water, acidified to pH 1 6, lost no ferrous iron after 3 months
Iron-Hydroxide-Removal from Mining Affected Rivers
waters The ferrous iron loads oxidize in the presence of oxygen and form iron hydroxides Iron hydroxide formation releases protons by hydratation of ferric iron Due to the natural buffer capacity of most river waters of the region of 1 to 1 5 mmol/L most waters keep their neutral pH Nevertheless
METHODS OF CONTROLLING FERRIC HYDROXIDE PRECIPITATION RESULTS
when 50 spent is 4 73 The pH value of spent 15 hydrochloric acid is 5 3 and ferric hydroxide will precipitates at a pH of 2 2 , and in the presence of H2S , ferrous sulfide (FeS) will have precipitated when the pH reaches 1 9, therefore acetic acid can not be used as iron controlling agent EFFECT OF TEMPERATURE
The relationship between pH and hydrogen ion concentration
Answer to sample question 1 Which of the following lists the above solutions in order of increasing hydrogen ion concentration? I B, A, C II C, A, B is the correct answer as shown above
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