Iculate the pH of a solution that is 0.05000 M NH₂Cl and 0.0300 M NH3 b for NH₂ = 1.8 x 10-5)
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- 0.03 The uv spectrum of a protein solution shows A280 nm = 0.43 and A260 nm = What is the approximate protein concentration in mg/mL?Make a 100 ml of a 1M stock solution of NaCl (you will need the molecular weight of NaCl).What would the concentration of acetic acid be if 0.70 M CH3COO was adjusted to the pH of 5.76? (K₂ of CH3COOH 1.75 x 10-5 M)
- Calculate the pH of a solution if [H3O+] = 3.4 x 10-2M Indicate whether the solution is acidic, basic, or neutralWhat is the pH of a buffer solution that is 0.20 M proprionic acid (HC3H4O2) and 0.1 M sodium proprionate (NaC3H4O2)? The KA of proprionic acid is 1.3 x 10-580mL of a 0.3M solution of hexapeptide Leu-His-Cys-Glu-Asn-Arg is adjusted to pH=pl. The solution is then titrated with 0.2M HCI to a final pH of 2.1. Sketch the titration curve, labelling the pH and volume axes. Indicate the volume of HCl needed to reach each relevant pKa value and equivalence point(s). Relevant pka values are: 2.1, 4.3, 6.0, 8.3, 9.8, and 12.5.