PQ-25. An aqueous buffer solution contains only HCN (PK, = 9.31) and KCN and has a pH of 8.50. What can be concluded about the relative concentrations of HCN and KCN in the buffer? (A) [HCN]> [KCN] (B) [HCN]< [KCN] (C) [HCM] = [KCN] (D) nothing can be concluded about the relative concentrations
what are recommendations on the existence of an HCM section in an organisation
What is the product of each reaction?
(1) HCM 12) LiAIH (3) H.O
1) КОН 2) 3) H2O+ с . CH2CO3H OT NaOH, HẠO heat KCN, HCL * KCN, HOI . ?
Choose the correct starting materials for the following Diels-Alder product: A CHO CHO CHO CHO CHO Doc CHO CHO CHO CHO 2.1 CHO Question 10(4 points) Which one of these compounds is insoluble in water, but soluble in both NaHCO3(aq) and NaOH(aq)? Ophenol O octanal O propanoic acid Op-methylbenzoic acid The best way to synthesize the following amine is: NH 2 H, N 1. NBS, bv 2. NaNH NHI O 1. NACN 2. LAIH 3. H,0 1. H.00 2. ex...
Choose the correct starting materials for the following Diels-Alder product: CHO CHO + CHO + CHO +
Question 32 Which structure is an enantiomer of structure B? CHO сно CHO CHO CHO CHO нь HO -он HOH H -он но- он H. HOH он H- Нанон HOCH Hнон HOH н-ном но Hн HOH Нон нон сон сон сон сон E F ОН HE D Снон B с сон А Structure E Structure A Structure D Structure C Structure Question 33
Question 12 Which Fischer projection corresponds with the following molecule? Br OH CHO CHO CHO CHO CHO H ОН HO -H HO- Br HO -H -H H- -Br HE -Br Br -H Br -H CH2CH, CH,CH, CH2CH3 CH2CH3 снясно II III IV y ΟΙ O II O III O IV V
10. Which Fischer projection corresponds with the following molecule? Br CHO CHO CHO СНО CHO OHHO- HOH HOB HO- - Br H Br Br Br CH.CH CH2CHE CH2CH3 CH2CH) CH2CHE III IV TIT II d. IV e. V b.
HCN is a weak acid (Ka=6.20×10−10) , so the salt, KCN, acts as a weak base. What is the pH of a solution that is 0.0420M in KCN at 25 °C?