Author: Anonymous

A sample of ammonium chloride dissolves in water, absorbing heat from the surrounding water, and causing the temperature to drop by 20 °C.  If the heat change for the reaction is +300 J, what is the heat change for the surrounding water?

How much heat is released when 35.0 g of water are cooled by 40.0°C?  

Which balanced equation best describes this reaction?   image.png

Identify the compounds that are soluble  in water:

Considering the following net ionic equation: Mg + Fe2+ à Mg2+ + Fe the species oxidized is ___ and the oxidizing agent is ___.

Given the following net ionic equation, select the correct pairing of half-reactions. Mg(s) + Zn2+(aq) à Mg2+(aq) + Zn(s) 

Which of these has a net dipole?  

What are the coefficients of the balanced equation that represents the reaction in a magnesium/aluminum electrochemical cell? * hint: make sure to balance the electrons on both sides Mg(s) + Al3+(aq) –>  Al(s) + Mg2+(aq)

What type of reaction is the following equation:  2 NaOH  +  H2SO4 –>  2 H2O  +  Na2SO4  

When heated, iron and sulfur combine to form a new compound, iron(II) sulfide.  In this reaction,