Review+3+for+Chemistry+Test+-+Tomorrow

Name: Date: Block: Review 3 for Chemistry Test
 * 1) We know a chemical reaction has occurred when . ..
 * 2) The volume increases c. a new substance is created
 * 3) Mass remains unchanged d. heat is added


 * 1) In a chemical equation, the compounds listed to the **right**of the arrow are called
 * 2) Products b. Reactants c. Reagents d. Catalysts


 * 1) When the coefficient 2 is written in front of the compound H2O, how many hydrogen atoms are present?
 * 2) 2 b. 4 c. 6 d. 1


 * 1) The pH scale . ..
 * 2) Is Logarithmic c. Uses the power of 10
 * 3) shows acidity/basic of a compound d. All of the above


 * 1) Acids and bases are both compounds involving which element?
 * 2) Acids have  ions and bases have  ions
 * 3) Acids turn litmus paper , bases turn litmus paper


 * 1) Use your Periodic Table to identify the following:
 * 2) Silicon’s number of Protons
 * 3) Vanadium’s number of neutrons
 * 4) Calcium’s valance electron shell
 * 5) The contents of Boron’s nucleus
 * 6) The lightest of all elements.
 * 7) The Noble Gas with the least amount of protons
 * 8) The heaviest transition metal


 * 1) Calculate the molecular weight of . . . (Show Your Work)


 * 1) AgNO3  d. MnCO2


 * 1) Li2(CN)2  e. Ga3(OH)2


 * 1) Ca2SO3  f. MoReONBaCK


 * 1) Diagram the nucleus of the following.


 * 1) Cr c. Rb


 * 1) Sn d. Cl


 * 1) Complete the table.
 * Magnesium ||  ||   ||   ||   || 3s2 ||
 * || Co ||  || 58.93 ||   ||   ||
 * ||  || 82 ||   || 125 ||   ||
 * Tungsten ||  ||   ||   ||   ||   ||


 * 1) During a class, 2 students conduct an experiment by mixing NaOH (Sodium Hydroxide) and HCl (Hydrochloric acid) in a flask with a balloon sealing the top. The experiment is done on a scale.
 * 2) Will a reaction occur? Explain your reasoning.
 * 3) What will happen to the balloon?
 * 4) What will happen to the mass recorded by the scale?
 * 5) Will the pH change? Explain.
 * 6) Calculate the molecular weight of both reactants. (Show Your Work)


 * 1) Write a balanced chemical equation with the products being water (H2O) and salt (NaCl).