<p>I’m too lazy for draw, but i know BF3 is sp2 and it’s trig planar. It doesn’t have lone pairs because B is an exception.</p>
<p>One of my review books says that Na is more electronegative than Br. Is that true?</p>
<p>c, BF3 doesn’t have lone pairs</p>
<p>no Br is more electronegative than Na</p>
<p>That’s what I thought. Rea is ■■■■■■■■.</p>
<p>Btw is electronegativity directly related to nuclear charge?</p>
<p>does anyone have the questions & answers to the released multiple choice exam? possibly any link online of pdf?</p>
<p>All of the following reactions can be defined as Lewis acid-base reactions except
(a) Al(OH)3(s) + OH–(aq) → Al(OH)4-(aq)
(b) Cl2(g) + H2O(l) → HOCl(aq) + H+(aq) + Cl–(aq)
(c) SnCl4(s) + 2 Cl–(aq) → SnCl6 2–(aq)
(d) NH4+(g) + NH2–(g) → 2 NH3(g)
(e) H+(aq) + NH3(aq) → NH4+(aq)</p>
<p>wouldn’t it be b since you are really forming a bond between the two reactants?</p>
<p>“Btw is electronegativity directly related to nuclear charge?”</p>
<p>electronegativity is how much an atom attracts an electron of another atom, and it is based on ionization energies and elecron affinities which are based on effective nuclear charge</p>
<p>PCl3 is not planer its a trigional pyrimidal, while CF3 is T-Shaped which is planer</p>
<p>and I would Say B as well for the Lewis Acid Base because H20 neither gains or borrows an electron pair</p>
<p>I would say E, since that’s a Bronsted Lowry acid-base reaction. All that’s happening is the donation of a proton, but nothing really with electron pairs.</p>
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<p>I think it’s B</p>
<p>You can define Bronsted Reactions with Lewis Reactions, for instance in E NH3 is the Lewis Base since it is donating to electron pair and H+ is accepting the electron pair thus its a acid.</p>
<p>all bronsted acid and bases are lewis acid and bases</p>
<p>Oh okay cool thanks guys!</p>
<p>Some questions about the physical format of the test:</p>
<p>Can you tear out the periodic table and equation sheets, or must you flip back and fourth?
Do you solve the problems in a space below them, or do you do it on another sheet of paper?</p>
<p>
</p>
<p>I’m pretty sure the sheet says “do not remove.” If chem is like calc, they give you room on the page to do the problems on that page.</p>
<p>My question: what are the most essential solubility rules we need to know?</p>
<p>NaCl is LEAST soluable in which of the following?
H2O
CCl4
HF
CH3OH</p>
<p>How is SnCl4(s) + 2 Cl–(aq) → SnCl6 2–(aq) a Lewis acid-base reactions ?</p>
<p>CCl4 (10 char)</p>