Determine if the following are Lewis acids, Lewis bases or neither. Briefly justify your choice.
CO2
HIO3
CH3CO2H
BF3
HCOOH
SnCl2
HCN
ICl3
SiF4
Determine if the following are Lewis acids, Lewis bases or neither. Briefly justify your choice. CO2...
Answer the question below: 1: i) Identify the Lewis acids and bases in each of the following reactions: a. NH3 + BF3 → F3B NH3 b. H2O + SO3 → H2SO4 c. NH4+ + OH- → NH3 + H2O d. CO2 + H2O → H2CO3 e. OH−+H+→H2O ii) Identify the following compounds as either a Lewis acid or Lewis base and as either Soft or Hard: a. Cr3+ b. SO3 c. SCN− d. I
ACIDS AND BASES - ARRHENIUS, BRONSTED-LOWRY, AND LEWIS 1-27 Briefly explain the three different definitions of acids and bases. 1-28 Calculate the Ka of nitric acid (HNO3). pka of nitric acid is -1.4. 1-29 Rank the following in order of decreasing acidity: NH, HF H,0 H2O 1-30 Rank the following in order of decreasing basicity: HSO4 H2O CH3COO N HY
6. There are two major theories of acids and bases in aqueous solutions: Arrhenius and Bronsted. a) In your own words, briefly explain the main difference between the two theories of acids and bases b) Which theory do you think is the most useful in chemistry? Explain your choice. c) Which of the following is an Arrhenius acid? A) H2SO4: B) LiOH; C) NH2CH3; D) CH3CH3; E) More than one of these is an Arrhenius acid. d) Which of the...
Attribute the following properties to an electrical synapse, a chemical synapse, both, or neither. Briefly justify your answer. (2 points each) a. No synaptic delay b. Requires connexins C. Metabolically expensive d. Unidirectional e. Can amplify signal
The following shows a list of weak acids and bases with their Ka and Kb values. Substances Ka Substances Kb Cyanic acid (HCN) 4.9 x 10-10 Ammonia (NH3) 1.8 x 10-5 Nitrous acid (HNO2) 4.5 x 10-4 Aniline (C6H5NH2) 4.3 x 10-10 Hydrofluoric acid (HF) 6.8 x 10-4 Pyridine (C5H5N) 1.7 x 10-9 Acetic acid (CH3COOH) 1.8 x 10-5 Methylamine (CH3NH2) 4.4 x 10-4 If you want to make a pH 8.0 buffer solution, which of the following acids or...
Each of the following compound has Lewis structures. Determine
which structure is more favorable. Justify your answers.
Problem 2. Determine whether the following signals are power or energy signals, or neither. Justify your answers. a) x(t)-Asint -00<t<oo b) x(t) = r(1)-r(1-1) c) x(t)-tu(t) d) x(t)- Aexp(bt) , b>0
4) Is the following IR spectra for CO2, H20, or HCN? Explain your choice. Assign each band and be specific (ie. bend, symmetric stretch, asymmetric stretch X-Y stretch...) Again, explain your choice of assignment 3600 400 Wavenunber nWavenumber cmA-1
Can
answer in multiple choice way
1. The following is FALSE about acid and bases: a. Weak acids generate weak conjugated bases. b. Acids can only protonate bases with higher pka values. c. Metal ions can be acids. d. Acid-base reactions favor weaker acids. 5. What are the expected products of the following reaction? 2. Which molecule is the most acidic? a. HCN (pKa = 4.7) . b. Isopropanol (pka - 17.1) c. water (pKa - 15.7) d. ammonia (pka...
Each of the following compounds has two Lewis structures. Determine which structure is more favorable. Justify your answers 2. (a) H2BF (b) HNO3 H-Q Hg-N