Referring to question 1, if the same 15.00mL 0.55M NaOH is now added to 150.0 mL...
If the same 5.00 mL of a 0.5M HCl is added to 150.0 mL of MOPS buffer. The buffer contains 0.500M MOPS-H and 0.500M MOPS. Calculate the new pH after the acid was added. MOPS pKa =7.2
1) 0.5 ml of 1 M NaOH was added to 0.5L of a 100mM buffer solution at pH=7.0. Calculate how the pH value is affected by this addition if a pKa value of the buffer is 7.47. b) 1ml of 0.01mM HCl is added to 10L of pure water. What is a pH of this solution?
A buffer is created by combining 150.0 mL of 0.15M methylamine (CH3NH2) with 150.0 mL of 0.20M of its conjugate acid (CH,NH4+). The K, value for methylamine is 4.37 x 104. a) Calculate the pH of this buffer. b) How many grams of NaOH would need to be added to raise the pH of this buffer to 11.00?
1. A buffer is prepared using 0.20 mol of H2PO4 and 0.10 mol of HPO42 in 500 mL of solution. Will the buffer capacity be exceeded if 5.6 g of KOH is added to it? What is the pH of the original solution and the pH of the new solution? (Kb 1.6 x 10-7) 2. How many milliliters of 0.113M HBr should be added to 52.2 ml of 0.0134 M morpholine to give a pH of 8? (The pKa of...
1) Using a 0.25 M phosphate buffer with a pH of 7.2, you add 0.79 mL of 0.48 M HCl to 54 mL of the buffer. What is the new pH of the solution? (Enter your answer to three significant figures.) 2) Using a 0.25 M phosphate buffer with a pH of 7.2, you add 0.79 mL of 0.48 M NaOH to 54 mL of the buffer. What is the new pH of the solution? (Enter your answer to three...
1) Calculate the pH of the solution that results from each of the following mixtures. A) 150.0 mL of 0.26 M HF with 225.0 mL of 0.32 M NaF B) 165.0 mL of 0.12 M C2H5NH2 with 275.0 mL of 0.22 M C2H5NH3Cl 2) A) As a technician in a large pharmaceutical research firm, you need to produce 100. mLof a potassium dihydrogen phosphate buffer solution of pH = 6.91. The pKa of H2PO4− is 7.21. You have the following...
1) How would you make 300 ml of a 0.1 M sodium phosphate buffer, pH 7.0 (pKa = 7.2) phosphate dibasic (the conjugate base). 2) What are the concentrations of acetate and acetic acid in a 0.2 M acetate buffer pH 5.3? The pKa for acetic acid is 4.76. 3)You have 100 ml of 0.1 M acetate buffer pH 5.2 (pKa 4.76). You add 10 ml of 0.1 M NaOH. Calculate the resulting change in pH and the buffering capacity...
#1. If you have 250. mL of a buffer that is 0.12 M in H2PO4- and 0.12 M HPO42- , what will be the pH after 27.77 mL of 0.193 M NaOH is added? Ka2 is 6.21 x 10-8 . #2. Given 1000. mL of a 0.434 M solution of C2H5NH2 (pKb = 3.19), what is the pH if 26.45 g of C2H5NH3Cl (81.5446 g/mol) are added?
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.
.65 mL of .24M NaOH are added to 21.6 mL of buffer calculate pH of buffer prior to base addition, after and pH change. what if instead of buffer it is 21.6 mL of distilled water. ph before, after and the change. 3 sig figs. buffer was made from .196M HCHOO .271M NaCHOO. with a given ph of 4.4