A 28-year-old male with severe myopia made an appointment to see his ophthalmologist when he began to notice flashing lights and floaters in his visual fi eld. He was diagnosed with a retinal detachment. The retina

TLS Online TPP Program

#Question id: 365

#Unit 1. Molecules and their Interaction Relevant to Biology

Water is a polar molecule: the oxygen atom with its unshared electrons carries a partial negative charge (δ−) of ___________, and the hydrogen atoms each carry a partial positive charge (δ+) of __________, where e is the charge of the electron.

TLS Online TPP Program

#Question id: 366

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the pH of a solution with a hydroxyl ion (OH-) concentration of 10-10 M?

TLS Online TPP Program

#Question id: 367

#Unit 1. Molecules and their Interaction Relevant to Biology

1.0 × 10^−4 mole of H+ (as HCl) is added to 1.0 liter of pure water. Determine the final pH of the solution.

TLS Online TPP Program

#Question id: 368

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is true about the properties of aqueous solutions?

TLS Online TPP Program

#Question id: 369

#Unit 1. Molecules and their Interaction Relevant to Biology

Calculate the pH of a 2.0 L solution containing 10 mL of 5 M acetic acid and 10 mL of 1 M sodium acetate. (pKa = 4.76)

TLS Online TPP Program

#Question id: 370

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statements is true about buffer solutions?