Which has more hydrogen ions, grapefruit juice (pH = 3) or tomato juice (pH = 4) and how much more or less? Otomato, 10x more; O tomato, 10x less; O grapefruit, 10x more; O grapefruit, 10x less;
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- If there is an increase in the hydrogen ion concentration from 38 nmol.l-1 to 82 nmol.l-1, what does the pH change from and to?1.0 oxygen saturation (Y) 0.8 0.6 0.4 0.2 0.0 0 20 40 60 blood pO₂ (torr) 80 100 120 for this picture where would be the effects of excess protons be drawn?and what's the effect on pH? in between the 2 shown curves and higher pH to the far right of both curves and lower pH to the far right of both curves and higher pH in between the 2 shown curves and lower pHWhich of the following statements about pH is (are) true: pH is a measure of free hydrogen ion concentration none of these are true both of these are true An increase in hydrogen ion concentration means a decrease in pH scale units
- نقطة واحدة The pH value is calculated mathematically as the Log of the * .hydrogen ion (H+) concentration False True OAs pH increases, there is increasingly more H+ than OH-A buffer contains 0.015 mol of lactic acid (pK₁ = 3.86) and 0.080 mol of sodium lactate per liter. H₂C OH Lactic acid OH Calculate the pH of the buffer. H₂C. Calculate the change in pH after adding 9.0 mL of 0.10 M HCl to 1.0 L of the buffer. O OH Sodium lactate Calculate the change in pH after adding 9.0 mL of 0.10 M HCl to 1.0 L of pure water. O Na+ buffer pH: buffer pH change: water pH change: units units
- Lemon juice has a pH around 2.5. Milk has a pH around 6.5-7. Which of the following statements about these two liquids is true? Lemon juice has a higher concentration of hydrogen ions compared to milk Milk has a lower concentration of hydroxyl ions compared to lemon juice Milk has a higher concentration of hydrogen ions compared to lemon juice The concentration of water in lemon juice and milk is identicalWhen comparing pH, a solution with a pH of 5 contains 100 times the amount of H+ when compared to a solution with a pH of 7.What is the difference in the H* concentration between lemon juice (pH 2) and black coffee (pH 5)? O The H concentration of lemon juice is higher than the H* concentration of coffee by 3 hydrogen ions. O The H* concentration of lemon juice is higher than the H* concentration of coffee by a factor of 1000. O The H* concentration of lemon juice is lower than the H* concentration of coffee by 3 hydrogen ions. O The H concentration of lemon juice is lower than the H* concentration of coffee by a factor of 1000.
- Using the Henderson-Hasselbalch equation, calculate the pH of a buffer solution made from 0.20 M CH3COOH and 0.050 M CH3COO- that has pk3= 4.7. 4.1 0.4 None of the answers is correct 2.5 5.3Which of the following combinations would be the best choice to buffer the pH of a solution at approximately 7? Ionization Constants for Aqueous Weak Acids at 25 °C Acid K. (pK,) Conjugate Base Hydrogen phthalate ion, Cg H4(CO2H)(CO2) Acetic acid, CH3 CO,H Acetate ion, CH; CO2- 1.8 x 10-5 (4.74) Weak Acid Phthalic acid, C6 H4 (CO,H)2 1.3 x 10-3 (2.89) Dihydrogen phosphate Hydrogen phosphate ion, H2 PO4 Hydrogen phosphate ion, HPO42 6.2 x 10-8 (7.21) ion, HPO,2- Phosphate ion, PO,* 3.6 x 10-13 (12.44) O Na, HPO4 and NagPO4 O NaH2 PO4 and NazHPO4 O H;PO4 and NaH2 PO4Concentrations and volumes are NOT the same thing. Concentrations are in units of mass/volume (i.e., g/l or mg/ml). Volumes are in units of only volume (i.e., 1. ml). 4. a. If you mixed 265 g of sugar with water to get a final volume of 725 ml. what is the concentration of this solution in g/l? Show your work. If you took 1 ml of this solution, what would the concentration be? Explain your reasoning. you prepare a stock solution (highly concentrated) of sugar in water whose concentration is 500 g/l. you need to make a new solution that is half (1/2) as concentrated and has a final volume of 100 ml. Describe how you would make this dilution. Step one: Your new solution has a concentration of_. Step two: To make 100 ml of this new solution, you will need to add_of concentrated stock solution plus_of water. Now make a second solution that is one-tenth (1/10) as concentrated as the initial stock solution and has a final volume of 100 ml. Describe how you would make this dilution.…