What do you mean by isotonic solution?

A solution with a low pH means what?

You have 12 mL of cells you need to treat with Hydrogen Peroxide (H2O2), such that the final concentration of H2O2 is 50 uM. How much of a 30 mM stock solution of H2O2 would you add to your cells?

A 0.10 M NaCl solution is (hypertonic/hypotonic/isotonic) to a 0.1M glucose solution.

The turn tonicity Refers to the strength of solutions. True or false?

What do buffers do and why are they important in biological systems?

Given 10 gram of vitamin C (E=0.18), we can make ml of isotonic Vitamin C solution.

What important role do buffers play in organisms? What prevents a strong acid or strong base from working as a buffer?

pH expresses the molar concentration of hydronium ions in an aqueous solution on a logarithmic scale. (Note that it is common to use the hydrogen ion, H*, to represent the hydronium ion, H3O+.) pH = -log[H3O+] [H3O+] = 10-PH As pH decreases, acidity increases. As pH increases, acidity decreases. • Acidic solution: pH 7 Part A - Calculating pH Submit [H₂0+] 1 Acidic pH 01 10¹ 102 103 104 105 106 107 108 109 10-10 10-11 10-12 10-13 10-14 stomach acid 3 wine lemon tomatoes juice vinegar, black soft drinks, coffee beer 6 Neutral urine milk 7 human blood pure water sea- water baking soda 10 11 12 13 14 milk of magnesia house- hold ammonia oven cleaner Basic household bleach Adapted from Biological Science by Freeman ©2008 Pearson Education, Inc. What is the pH of an aqueous solution with the hydronium ion concentration [H3O+] = 2 x 10-14 M? Make sure that your answer has the correct number of significant figures. For help determining the correct number of significant figures, see Hint 3. ►…

What is meant, in terms of concentration of H+ and OH- ions, if we say a solution has a neutral pH?