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Question: cell biology lab and lecture name dr bashir atteia ultple...

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CELL BIOLOGY LAB and LECTURE Name Dr. Bashir Atteia ULTİPLE CHOICE Choose the one alternative that best completes the statement or answers the estion t is the concentration of hydroxide ion in an aqueous solution with an H+ concentration of 2 x 10-5 N A) 2 x 109 M E) Cannot calculate from the information given B) 5 x 10-10 M C) 2 x 10-19 M D) 2 x 10-19 M 2) In pure water, the concentration of Ht plus equals A) 1 M B) 1 x 10-14 M C) 1 x 10-7 M D).07 M 3) The pH of a 10-4 M solution of HCI is A) 3. B) 3.5 C) 4 D) 4.5. E) greater than 4.5 4) If the pH of a solution is decreased from 9 to 8, it means that the concentration of A) OH- has increased tenfold (10X) compared to what it was at pH 9 B) H+ has increased tenfold (10X) compared to what it was at pH 9 C) H+ has decreased to one-tenth (1/10) what it was at pH 9 D) H+ has doubled compared to what it was at pH 9 5) Which of the following statements is true about buffer solutions? A) They maintain a constant pH when acids are added to them but not when bases are added to them. B) They maintain a relatively constant pH when either acids or bases are added to them. C) They fluctuate in pH when either acids or bases are added to them D) They maintain a constant pH when bases are added to them but not when acids are added to them. One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3). Carbonic aci weąk acid that, when placed in an aqueous solution, dissociates into a bicarbonate ion (HCO3) and a hyda ion (H), as noted below. H2CO3-HCO3-+ H+ If the pH of blood drops, one would expect A) the HCO3 to act as a base and remove excess H+ by the formation of H2Co3 B) the HCO3- to act as an acid C) the concentration of bicarbonate ions (HCO3) to increase D) a decrease in the concentration of H2cO3 and an increase in the concentration of HCO3 and remove excess H+ by the formation of H2CO3 ider two solutions: solution X has a pH of 4; solution Y has a pH of 7. From this information, we ca reasonably conclude that ntration of hydrogen ions in solution Y is 1000 times as great as the concentration of hydroge ) the conce in solution X B) solution Y has no free hydrogen ions ( C) the solution Y D) the in solutionY concentration of hydrogen ions in solution X is 3 times as great as the concentration of hydrogen io concentration of hydrogen ions in solution X is 1000 times as great as the concentration of hydroge ker contains 100 milliliters (mL) of NaOH solution at pH 13. A technician carefully pours into the 8) A bea l at pH 1. Which of the following statements correctly describes the result of this mixing? 0ml of HCI p
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