Translating Equations Practice

Evaluation/Assessment: Objective: Today I will be able to: Utilize the law of conservation of mass Balance chemical equations Correctly translate equations from words to symbols Evaluation/Assessment: Informal assessment – listening to student responses as the complete the practice problems Formal assessment – analyzing student responses to the translation practice problems and the exit ticket Common Core Connection Build Strong Content Knowledge Make sense of problem and persevere in solving them  Model with mathematics Use appropriate tools strategically Look for and express regularity in repeated reasoning

Lesson Sequence Evaluate: Warm – Up Explain and Elaborate: Balancing Equations Elaborate: Translating Equations Evaluate: Exit Ticket

Warm – Up Translate the following word equations: Ammonia reacts with hydrogen chloride to form ammonium chloride. Calcium Carbonate (CaCO3) decomposes to form calcium oxide and carbon dioxide. What are the 7 diatomic elements?

Warm – Up Answers Translate the following word equations: Ammonia reacts with hydrogen chloride to form ammonium chloride. NH3 + HCl -> NH4Cl Calcium Carbonate (CaCO3) decomposes to form calcium oxide and carbon dioxide. CaCO3 -> CaO + CO2 What are the 7 diatomic elements? H2 N2 O2 F2 Cl2 I2 Br2

Objective Utilize the law of conservation of mass Correctly translate equations from words to symbols Balance chemical equations

Homework None

Agenda Warm – Up Balancing chemical equations Translating Equations Practice Exit Ticket

7 Diatomic Elements More Stable for them to exist with 2 bonded together H2 N2 O2 F2 Cl2 I2 Br2

Balancing Chemical Equations Notes

What is the Law of Conservation of Matter? Matter can not be created or destroyed, it can be transformed from one form to another.

Why is this important for chemical equations? Same number of each element on the reactant side as the product side Balanced

Tips for Balancing Equations Must satisfy the law of conservation of matter Only use whole number coefficients All atoms should be present on both the reactant and product side of the equation Check to see if the equation is already balanced Coefficients go in front of the substance and multiply all subscripts

Tips for balancing equations continued One (1) is understood and does not have to be written as a coefficient All coefficients should be reduced to lowest terms Balance most complex species first and then move to single atoms Double check your work!

Example #1 BaS + NaCl  Na2S + BaCl2

Answer BaS + 2 NaCl  Na2S + BaCl2

Example #2 P + O2  P2O5

Answer 4P + 5O2  2P2O5

Example #3 Na2O2 + H2O  NaOH+ O2

Answer 2Na2O2 + 2H2O  4NaOH+ O2

Balancing Equations Practice Complete #1 of the practice at your desk.

Exit Ticket Translate and balance the following equation: Zinc reacts with copper(II) nitrate to form zinc nitrate and copper. 2 Zn + Cu(NO3)2 --> 2 ZnNO3 + Cu