Question 19 (2 points) Which pH value indicates the higher concentration of H30+? A) pH 11.5 B) pH 5.2 C) pH 7.0 D)...
c. Equal to 7.0 Question 2 1 pts A solution whose concentration of H3O+ is between 1.0x10-8 Mand 1.0x10-'M would have a pH: a. Lower than 7.0 b. Higher than 7.0 c. Equal to 7.0 D Question 3 1 pts Black tea has a nHof 42 while Denei haennu 7 Alhirhaft
Which of the following statements describes a basic solution? 1. [H30+]> [OH] 2. [H30]<[OH] 3. [H30'] x [OH] #1 x 10-14 4. [H3O+]/[OH] = 1 x 10-14 5. [H3O+]/[OH]=1 If the pH of a solution is 10, what is the hydronium, H ion concentration? 1. A) 1 x 10-10 M 2. B) 1 x 1010 M 3. C) 10 M 4. D) 10 M 5.E) * 1 1010 M As the pH increases the hydroxide ion concentration 1. A) goes...
Which of the following solutions is acidic? A. [H30+] = 7.0x10^-7 M B. [H3O+] = 1.5 x 10^-10 M C. [H3O+] <7.0 X 10^-7 M D. [H3O+] > 7.0 X 10^-7 M E. [H3O+] = 1.0 X 10^-14 I attempted this by finding pH via the negative log of each H3O value.... which gives me a pH of 6.15 when [H3O+] is 7.0 x 10^-7 M. The way the question is worded is tricky however - it seems that only...
6. Which of the following solutions is acidic [H3O+] = 7.0 x 10-7 M B)/ [H3O"] = 1.5 x 10-10 M C) [H3O+] < 7.0x10-7 M D) [H30]> 7.0 x 10'M E) 「HOT! = 1.0x10-14 M 25. The pH of tomato juice is about 4.5 Calculate the concentration of hydrogen ions in this juice A) 3 x 10-10 B) 3 x 10-5 M C) 5 x 104 M D) 4 M E) 3 x 1010 M
would you please answer this question?
1. Which Keq value indicates the greatest concentration of reactants at equilibrium assuming similar stoichiometry? A. 6.7 x 105 B. 3.2 x 109 C. 1.4× 10-3 D. 3.2 x 107 lur indicates the preatest concentration of products at equilibrium assuming
EFFECT OF pH:
1. Bubble height indicates the degree of enzyme activity. Based
on the results of your experiment, which tube had the highest
bubble column height?
What can you conclude about this pH? 2. Explain the results of
the other two tubes. What is your conclusion concerning the effect
of pH on enzyme activity?
Results: Table 5.1 - Catalase Activity Tube # Contents Bubble Column Height (mm) catalase/H202 dH20/H202 catalase/sucrose 27mm Omm | Omm E Table 5.2 - Effect...
1. Multiple choice: Each question is worth 4 points (some useful equation are on last page) 1. As ionic strength increases, the values of activity coefficients: a. change randomly C. decrease b. increase d. do not change What is the pH of a solution with (HA) = 0.01M and [A] = 0.01M, when pk, = 5.2? (Assume HA and A) are conjugates. a. 5.2 b. 4.2 C. 6.2 d. 7.0 Which solution has a higher ionic strength? A 0.500M solution...
What concentration of HCl will have a pH of 5.0? b) What concentration of acetic acid will have a pH of 5.0? (For acetic acid, pKa=4.76) c) What concentration of phosphoric acid will have a pH of 5.0? (For H3PO4, pKa1 = 2.12, pKa2 = 7.21, pKa3 =12.32) d) What is the pH of a 10 mM solution of phosphoric acid? e) How much 1.0 M NaOH must be added to 100 ml of 10 mM H3PO4 to raise the...
please answer both question and box the answers
QUESTION 2 What is the H30 ion concentration in an aqueous solution having an OH concentration of 1.0 x 10 M at 25 °C? а. 1.0x 102 M b. 13x 102 M C. 12x 10 2 M d. 12x 10 12 M 1.0x 10 12 M QUESTION 3 Which of the following salts has the lowest molar solubility in water? SrCO3 (Ksp-9.3 x 10-10) b. 1.8x 10-10) AgCl (Ksp C. 10-10 BaCrO4...
Question 19 Not yet answered Points out of 1:00 P Flag question Calculate the pH of 2 L of 0.048 M KOH (aq) Select one: O A. 12.68 O B. More information is needed to solve this problem O C. 12.98 O D. 1.32 O E. 12.58