Question

1. ab + cd → ad + be is this a legitimate example of an exchange reaction? why or why not? 40. when you do a load of laundry, why do you not just drop a bar of soap into the washing machine? in other words, why is laundry detergent sold as a liquid or powder? 41. the ph of lemon juice is 2, and the ph of orange juice is 4. which of these is more acidic, and by how much? what does this mean? 42. during a party, eli loses a bet and is forced to drink a bottle of lemon juice. not long thereafter, he begins complaining of having difficulty breathing, and his friends take him to the local emergency room. there, he is given an intravenous solution of bicarbonate. why? 43. if the disaccharide maltose is formed from two glucose monosaccharides, which are hexose sugars, how many atoms of carbon, hydrogen, and oxygen does maltose contain and why?

Explanation:

39.

In a legitimate exchange reaction, elements or groups exchange partners. Here, the B - C bond is broken and a B - E bond is formed instead of a typical exchange between the reactant components. In a proper double - displacement reaction, we should have AB + CD → AD+CB. So this is not a legitimate exchange reaction as the product BE is not consistent with the expected pattern of an exchange reaction.

Liquid or powder detergents have a larger surface area compared to a bar of soap. A larger surface area allows for more efficient contact with dirt and stains on clothes, and also for better dissolution in water. This leads to more effective cleaning. A bar of soap may not dissolve well and may leave residues on clothes.

The pH scale is logarithmic. A lower pH indicates a higher hydrogen ion concentration and thus higher acidity. Lemon juice with a pH of 2 is more acidic than orange juice with a pH of 4. The difference in pH units is 2. Since the pH scale is logarithmic with a base of 10, the hydrogen - ion concentration of lemon juice is 100 times that of orange juice ($10^{4 - 2}=100$). A lower pH means a higher concentration of hydrogen ions and a more acidic solution.

Answer:

No, because in a proper exchange (double - displacement) reaction, the products should be in the form of AB + CD → AD + CB, not AD + BE.

40.