If I have an 85% concentration of lactic acid (w/w) how much do I need to make 300 mL of a 200g/L solution?
If I have an 85% concentration of lactic acid (w/w) how much do I need to make 300 mL of a 200g/L solution?
You need to make 2.00 L of a sulfuric acid solution that has a concentration of 0.103 M. If you are going to only use 25.0 mL of stock solution to make the dilution, what must the concentration of the stock solution be?
1. Calculate the pKa of lactic acid, given that when the concentration of lactic acid is 0.010 M and the concentration of lactate is 0.087 M, the pH is 4.80 B. Calculate the ratio of the concentrations of acetate and acetic acid required in a buffer system of pH 5.30 C The pH of a 0.20 M sodium acetate buffer is 5.1. The pKa of acetic acid is 4.76. Explain in details (showing all calculation) how to prepare the buffer...
You have to make 100 mL of a solution of GABA at a concentration of 10-6 M. How much GABA (in µg) do you need?
9. A buffer solution was prepared by mixing 12.0 mL of 0.12 mol L lactic acid (HLac) with 18.0 mL of 0.16 mol L sodium lactate (NaLac). Kallactic acid) = 1.4 x104. (10 marks) a) Calculate the pH of the solution. Write all relevant chemical equations. State and verify any assumptions you make. 1/6] b) Two 200-ml buffer solutions were prepared with the same pH using different pairs of compounds, as outlined in the table below. Which of these two...
You need a 20% acid solution. You have 980 mL of 15% on hand. How much of a 90% acid solution should you add to obtain the desired solution? mL of 90%
5. (1pt) How much solid NaOH will you need to prepare 300 ml of an approximately 0.1 M solution? 6. (2pt) If you have 5.00 ml of a 5.5% acetic acid solution, how many grams and moles of acetic acid are in that solution? (Assume that the solution has a density of 1.00 g/ml).
How many mL of 1M NaOH do you need to add to 300 mL of 1 M acetic acid to make a buffer with a pH of 5.46? Water will be added to bring the total volume of the buffer to 1 L. The pKa of acetic acid is 4.76.
You have a 1 M solution of NaCl. How much do you need to dilute to make 10 L of isotonic saline (0.9%)? Remember that the units of volume and concentration must be the same on both sides of the equation.
2. How many ml of a 50% w/v acetic acid solution are required to prepare 1 L of 5% w/v acetic acid? 3. How many ml of concentrated HNOs are required to prepare 2L of 0.15N HNOs? 4. How many milliliters of a stock solution of 20% w/v NaOH are required to prepare 800 ml of a 2.5% w/v solution? 5. Suppose that you start with a 5X solution A and you want a final volume of 10 microliters of...
You are preparing 1.00 L of a 0.50 M solution of sulfuric acid. You have a stock bottle of concentrated acid (18 M). How much 18 M acid do you need to make your dilution in mL?