How many moles of X -? Moles of X - = number of moles of alkali used up.Ĭoncentration of X - = moles of alkali used / volume in dm 3įind by rearrangement and put in the numbers: pH pKa CH3COOH + log 10 ( CH 3 COO - / CH 3 COOH) pH 4.75 + log 10 (0.02/0.05) pH 4.75 + log 10 (0.4) pH 4.750 + (-0.398) pH 4.352 Example 2: Preparing Buffer solution with ammonia and hydrochloric acid You were given 40 cm 3 of 0.1 M ammonia solution and you have added 10 cm 3 of 0.1 M HCl solution. Now, you can easily solve basic to advance chemistry equation problems by. We don’t know how to learn about chemistry without effort, but we can assist you to solve the chemistry problems by providing the free chemistry calculators. The pH can be used to determine what a substance is and how it will react under certain circumstances. As chemistry seems very frightening & illogical, but it is very interesting & useful. In the classroom or lab, there are many benefits to knowing the pH of a substance. This is what a fumic nitric acid burn looks. The pH scale ranges from 0 to 14 and is a measure of acidity or alkalinity. And for other homework questions, dont post in this sub, go to chemistry forums. If you have gotton a question like this, chances are the formula and tables needed are in your book. (don’t worry about V unless you have to because it will probably cancel out) How would I go about calculating the pH of 0.1M HCl, given that the pka of this in CH3CN is 8.9. Step 3: Finally, the chemical formula will be displayed in the new window. To get pH value as output, you need to give Input i.e Concentration and select. Step 2: Now click the button Calculate to get the formula. pH Calculator is a free online tool that displays the pH of any chemical. What is final concentration of the acid (HX)?Ĭoncentration of acid = moles of acid / volume in dm 3 How to Use the Chemical Calculator The procedure to use the chemical calculator is as follows: Step 1: Enter the chemical name in the input field. Moles of acid left over = moles of acid at the start – moles of alkali added Show calculator The pH scale is used to measure the acidity or basicity of a solution. Get the equation right: HX + NaOH ? NaX + H2OK Calculate the pH of a buffer solution formed by adding 20.00 cm 3 of 0.10 moldm -3 NaOH to 40.00 cm 3 of the weak acid, HX, which has a concentration of 0.20 moldm -3 and a Ka value of 5 x 10 -6.
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