Wikipedia
.ph - .ph is the Internet country code top-level domain (ccTLD) for the Philippines. Introduction The official domain registry of the .ph domain is dotPH Domains Inc. dotPH holds and maintains the database of PH domain names, specifically .ph, .com.ph, .net.ph, .org.ph, .mil.ph, .ngo.ph..
PH - pH is a measure of the acid ity or basicity of a solution. It approximates but is not equal to p[H], the negative logarithm (base 10) of the molar concentration of dissolved hydrogen ion s (H+). Crudely, this matches the number of places behind the decimal point, so for example 0.1..
TutorVista
Solved Problems
Solving equations involving exponentials and logarithms 1. Find x when ln (x + 1) = 5 Solution: x + 1 = e 5 ; x = e 5 - 1 = 147.41 2. Solve 5 x = 7 Solution : Taking natural logarithms both sides, x ln 5 = ln 7. Hence x = ln 7/ln 5 = 1.21 3...
pH of Salts
Basic salts are stronger in their basic nature and show a pH greater than ..
The pH Scale
The strength of acids and bases can be expressed in terms of the concentration of the hydronium ions or hydroxyl ions in a solution. The concentration of hydronium ions in a solution can be expressed as moles of hydronium ions per litre of solution. This is expressed by a term called 'pH'..
The strength of acids and bases can be expressed in terms of the concentration of the hydronium ions or hydroxyl ions in a solution. The concentration of hydronium ions in a solution can be expressed as moles of hydronium ions per litre of solution. This is expressed by a term called 'pH'..pH of Salts
Neutral Salts - A neutral salt arises due to the neutralization reaction. Here, salts of strong acid and strong base combine to form such salts that show a neutral pH of ..
Science Daily
PH - pH is a measure of the activity of hydrogen ions (H+) in a solution and, therefore, its acidity or alkalinity. See also: Health & Medicine Earth & Climate Matter & Energy Aqueous solutions with pH values lower than 7 are considered acidic, while pH values higher than 7 are considered alkaline.. For more information about the topic PH, read the full article at Wikipedia.org, or see the following related articles: Acid — An acid (often represented by the generic formula HA) is traditionally considered any chemical compound that, when dissolved in water, gives a ...  > read more Electrolyte — An electrolyte is a substance that dissociates into free ions when dissolved, to produce an electrically conductive medium. Electrolyte and sports ...  > read more Soil pH — Soil pH is an indication of the alkalinity or acidity of soil. It is based on the measurement of pH, which is based in turn on the activity of ...  > read more Citric acid — Citric acid is a weak organic acid found ....
Bruce H Lipton, PhD 'Fractal Wisdom'geometry to explain how unique answers to the global issues of human community may be solved by learning from the integrated community of cells within the human body. If this is interesting to you, consider jumping off into the deep end in this year's workshop with Daniel Pinchbeck at the omega campus: www.eomega.org or check out our other workshops working to delve into evolving ways of life that equate a sustainable human culture: www.eomega.org Omega Institute www.eomega.org ... Fractal ...
Bruce H Lipton, PhD 'Fractal Wisdom'www.eomega.org Bruce H Litpon, phd uses the insights of fractal geometry to explain how unique answers to the global issues of human community may be solved by learning from the integrated community of cells within the human body. If this is interesting to you, consider jumping off into the deep end in this year's workshop with Daniel Pinchbeck at the omega campus: www.eomega.org or check out our other workshops working to delve into evolving ways of life that equate a sustainable human culture: www.eomega.org Omega Institute www.eomega.org
Question : To a buffer system containing 0.1M acetic acid and sodium acetate each, 0.01M of sodium hydroxide is added. The pH of the system is 4.76.Calculate the change in concentration of the salt due to the addition of alkali.
Answer : acid --> H+ & anion , the NaOH removes the H+, & the reaction shift to the left increasing the concentration of the anion by 'x', & decreasing the concentration of the acid by 'x' the K for acetic acid is 1.8e-5, its pK = 4.74 the henderson Hasselbach equation says: http://en.wikipedia.org/wiki/Henderson_Hasselbalch_equation PH = Pka & log [anion] / [acid] 4.76 = 4.74 & log [anion] / [acid] 0.02 = log [anion] / [acid] 10^x for both sides 1.047 = [anion] / [acid] 1.047 = [0.1+x] / [0.1-x] 1.047 [0.1-x] = [0.1+x] 0.1047 - 1.047x = 0.1+x 0.1047 - 0.1 = 1.047x + x 0.0047 = 2.047x x = 0.002296 molar change in concentration your answer is: 0.002 Molar change
Answer : acid --> H+ & anion , the NaOH removes the H+, & the reaction shift to the left increasing the concentration of the anion by 'x', & decreasing the concentration of the acid by 'x' the K for acetic acid is 1.8e-5, its pK = 4.74 the henderson Hasselbach equation says: http://en.wikipedia.org/wiki/Henderson_Hasselbalch_equation PH = Pka & log [anion] / [acid] 4.76 = 4.74 & log [anion] / [acid] 0.02 = log [anion] / [acid] 10^x for both sides 1.047 = [anion] / [acid] 1.047 = [0.1+x] / [0.1-x] 1.047 [0.1-x] = [0.1+x] 0.1047 - 1.047x = 0.1+x 0.1047 - 0.1 = 1.047x + x 0.0047 = 2.047x x = 0.002296 molar change in concentration your answer is: 0.002 Molar change
Question : How do you solve the acid/base chemistry problem..
What is the pH of a solution obtained by mixing
30.00 mL of 0.250 M HCL and
30.00 mL of 0.125 NaOH
Answer : The reaction that will happen when you combine these two solutions is: HCl + NaOH --> H2O + NaCl. In your case, you are starting with more HCl than you have NaOH. Consequently, you can just treat this like a stoichiometry and limiting reactant problem. First convert the molarity and the volume of HCl into moles HCl, and do the same with the NaOH. Determine how many moles of HCl you have remaining (how much excess HCl you have) by subtracting the moles of NaOH from the moles of HCl. Now, that number of moles of HCl is in 60 mL, right? so you can calculate the molarity of HCl in the final solution. Since HCl is a strong acid, just take the -log of the HCl concentration to give you the pH of the solution.
Answer : The reaction that will happen when you combine these two solutions is: HCl + NaOH --> H2O + NaCl. In your case, you are starting with more HCl than you have NaOH. Consequently, you can just treat this like a stoichiometry and limiting reactant problem. First convert the molarity and the volume of HCl into moles HCl, and do the same with the NaOH. Determine how many moles of HCl you have remaining (how much excess HCl you have) by subtracting the moles of NaOH from the moles of HCl. Now, that number of moles of HCl is in 60 mL, right? so you can calculate the molarity of HCl in the final solution. Since HCl is a strong acid, just take the -log of the HCl concentration to give you the pH of the solution.