Question

UUDHILDLIve you 3. Suppose the acidity level of snow in various areas is being compared. Which of the following examples of melted snow has produced the most acidic solution? (H.O'= 1.42 x10(1) POH 7.55; (iii) pH-5.89; (iv) [OH) - 2.2 x 10° Solution: 4. Use of the base methylamine (CH NH.) to replace azone-damaging compounds is becoming more widespread. Methyl amine is now used to make pesticides and herbicides to protect potatoes and tomatoes. The K, for CH,NH, is 4.2 x 104. (A) What would be the pH of a 0.0010 M solution of this base? Solution: (B) While methylamine is a weak base, NaOH is considered a very strong base. What is the pH of a solution of NaOH that has a molarity of 1.0 x 10-*? Clue: start this problem writing out the charge balance and the mass balance for what is actually in this solution? Solution:

Answer 1

3 pH10 CH2] 7 pH6.85 14-pon 14-7.55 17 H6.45 pH= S.89 17 iv) рон- 70H8.66 PH 14-POH pH 5.3y 17 14-8.66 leAAt in (iv) olution, so it ia So, pH most acidic