To calculate the exact pH, work out the molarity of the solution, then apply that to the formula for pH. What is the 1-516-662-5404 For each compound enter compound name (optional), concentration and Ka/Kb or pKa/pKb values. [H3O+] = 10-pH  or  [H3O+] The acidic nature of an aqueous solution can be obtained by pH value which uses hydrogen ion concentration. The hydronium This means it has a pH toward the top end of the pH scale, which ranges from 0 to 14. Then you can calculate the concentration of NaOH solution by pOH = -log10[OH-(aq)] . The HCl is a strong acid and is 100% ionized in water. Calculate pH of strong acid and weak acid solution. For example, a reactant’s concentration may change by  many orders of magnitude. Then we add dilute HCl to react with NaOH and calculate pH of the solution to obtain three titration curves. But also cleaning solutions often have an extremely high level of acidity or basicity. To calculate the pOH of a solution you need to know the concentration of the hydroxide ion in moles per liter. Calculating pH. The initial [H+] is 0.10 mol/L, and its  concentration after adding 75 mL of NaOH is 5.0 × 10-13 mol/L. Example:  A solution has a pOH of 11.76. According to the H3O+ or OH- concentration and stoichiometric ratio of dissociation of the compound, the concentration of dissolved compound is found. of NaOH is 0.5 , from this you can calculate pOH. Ka = 10-9.74 = 1.82 x 10-10. Room temperature is 25 0 C. Calculate concentration of solution of known pH . In both cases the value is determined by the decimal logarithm of the reciprocal of the hydrogen ion (pH) or the hydroxide ion (pOH) activity in a solution. m = M*n Because Hydrocholoric Acid is an acid, we calculate the pH: pH = -log[0.0027] = 2.6 a base. A 0.3% NaOH solution corresponds to 3 g NaOH in 1000 g water. quickly calculated. NaOH and HCl react 1:1 ratio according to the stoichiometric equation. Losing an electron creates a positive ion, and gaining an electron creates a negative ion. A 0,01% HCl solution is 0.1 g HCl in 1000 g water. All other trademarks and copyrights are the property of their respective owners. &= 2.036 Material & Chemicals Kb, for aniline if the pKb is 9.38. Calculate the concentration of OH-ions and pH of solution. 13 + pOH = 14 It is a fundamental parameter used to understand the properties of soil and water. for the ammonium ion, Ka, if the pKa is 9.74. The acidity or basicity of a aqueous solution can be determind by either measuring the pH or the pOH. API Research & Development The HCl is a strong acid and is 100% ionized in water. The pH of your NaOH solution is 13. 4g of solid NaOH are dissolved in water and then diluted the mixture upto 250cm 3. If we are interested in viewing the progress of the  reaction graphically, we might wish to plot the reactant’s concentration as a  function of time or as a function of the volume of a reagent being added to the  reaction. M = molecular weight Keep in mind these calculations are only valid under the following conditions: Using an acid or basic cleaning solution or detergent can have adversely effects on (metal) materials used in an installation. that has a pOH of 5.70? The pKb  is calculated using the expression: where Kb is the equilibrium constant for the ionization of The hydronium ion concentration can be found from the pH by the reverse of the mathematical operation employed to find the pH. Using a 0,01% hydrochloric acid (HCl) solution to clean some components. pKa = - log (1.78 x 10-5) = - ( - 4.75) = 4.75. The molarity of NaOH solution is 0.0092 M. {eq}\left[ {{\rm{O}}{{\rm{H}}^ - }} \right] The room temperature is 25 0 C. Note : M = mol dm-3. A pH lower than 7 is acidic, while a pH higher than 7 is alkaline. Calculate pOH from pH by using the pH + pOH = 14 (at 25 0 C) Then you can calculate the concentration of NaOH solution by pOH = -log 10 [OH-(aq)]. In this tutorial, we are going to do some problems which contains relationship of mass, concentration and pH in solutions. i like your products but is not available in nigeria, please advise how to be a customer. Example:   Calculate the value of the ionization constant 9.74 = - log (Ka) pH is calulated when an acid is dissolved in water. pOH = 1. 0.1 = n/0.5      [500 ml = 0.5 dm3] The molarity of the NaOH solution is 0.1 M. Ionization is the addition or removal of an electron to create an ion. Calculate the pH of a 0.2M solution of ammonia. -5.70 = log[OH-] Now we know the pOH of NaOH solution. \end{align*} Calculate concentration and pH of NaOH solution. {/eq}. Similarly, for the knowledge of alkaline solution, pOH value is needed which uses hydroxide ion concentration. Pure water has a pH very close to 7. pH levels are very important in industries like the Food & Beverage industry.