Use the following chemical equation for the remaining questions: 2LiBr + I2 → 2LiI + Br2
** answers should be in correct number of significant digits for 2a and 2b**
2a. 174 g LiBr is equal to how many moles of LiBr?
1 mol
1.00 mol
2.00 mol
2 mol

2b. If 812 g LiBr is added to the reaction, how many liters of Br2 will be produced?
22.40 L
52.3 L
52.27 L
22.4 L

Honors Only
2c. If 22 g LiBr produces 41 g LiI and 35 g I2 produces 45 g LiI, which reactant is the limiting reactant?
LiBr
I2
LiI
Br2

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.

c) should be the answer.