Given Problem: Draw the Lewis dot structures, identify the molecular geometry, and give the bond angle for the following compounds: BeF2 BCl3 SI6 1. BeF2: The first step is to draw the Lewis dot structure. This can be done by identifying how many bonding groups are involved. A bonding group, counts as 1 lone electron, an electron pair, … Continue reading VSEPR Theory Examples (chem.purdue)
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Balancing Equations (Chem.libretext example)
The point of this exercise is to practice balancing reactions. Many students get overwhelmed when they face having to balance equation usually because it's hard to determine where to start. Given Problem: Lead (IV) Hydroxide and sulfuric acid react as: Pb(OH)4+H2SO4→ Pb(SO4)2+H2O Balance the equation: 1. The first step to balancing a chemical reaction is to identify … Continue reading Balancing Equations (Chem.libretext example)
Calculating Temperature Change Using Q=mCsΔT
This problem is designed to get you comfortable working with the equation given, and is good because it gets you to think of Q in terms of joules. Given Problem: 25 grams of gold (Au) is initially at 27°C. It absorbs 2.35 kJ of heat. What is the final temperature of the gold? The specific heat … Continue reading Calculating Temperature Change Using Q=mCsΔT
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