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for 0.9% NaCl solution and 10% NaCl solution, which one has higher concentration of WATER?
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- I want to make a buffer solution containing 1 M glycene pH = 10 (Na+), 1 mM ZnCl2 , 1 mM MgCl2. I have the stock solutions 1 M glycene, 1 M MgCl2, 1 M ZnCl2, and 10 M NaOH. My final volume of buffer solution needs to be 250ml. how much (in ml) of each solution should i put into my buffer?What is the pH of a 0.25 M solution of acetic acid, Ka = 1.8 x 105. What percentage of the acid is dissociated?A 1.143 g sample contains only vitamin C (C,H, 0,) and sucralose (C,H,Cl, O,). When the sample is dissolved in water to a total volume of 31.7 mL, the osmotic pressure of the solution is 3.91 atm at 285 K. What is the mass percent of vitamin C and sucralose in the sample? vitamin C: sucralose: %
- What is the pH of a solution of 100 ml of 0.01 M H3PO4 and 100 ml of 0.01 M Na3PO4?How much water must be added to 300 mL of an aqueous solution of 0.2 M acetic acid in order to double the degree of ionization? Take the acid ionization constant of acetic acid to be 1.8 x 10-5.If 4 mL of 1 M NaOH is added to 100 mL buffer, would it still be a usable buffer according to the conventions? Explain why or why not.
- If an aqueous solution has a hydroxyl ion concentration of 1 × 10-6 M, what is the concentration of hydrogen ion ([H+]) ? [H+] = 1.0 x10-5 MWhen 2.43 g of a nonelectrolyte solute is dissolved in water to make 435 mL of solution at 25 °C, the solution exerts an osmotic pressure of 895 torr. What is the molar concentration of the solution? concentration: 0.045 M Incorrect How many moles of solute are in the solution? moles of solute: 0.034 mol Incorrect What is the molar mass of the solute? molar mass: 69.12 g/mol IncorrectWhat is the pH of the solution given the following information? Methyl orange = yellow Methyl red = yellow Bromothymol blue = green Note: use the provided reference table for color indicators below as a guide pH 5 pH 8 pH 7 pH 6
- Suppose you wanted to make a buffer of exactly pH 7.00 using KH2PO4 and Na2HPO4. If the final solution was 0.1 M in KH2PO4, what concentration of Na2HPO4 would you need?How much of the enzyme proteinase k (solute) is required to make 250ml of a solution with a concentration of .01mg/ml? (Weight/volume ratio)If 10g of salt was mixed in 1L water. What percent solution will this be.