2/20 & 2/23. Homework Turn In Put lab book in cabinet Do not tear out copies.

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Presentation transcript:

2/20 & 2/23

Homework Turn In Put lab book in cabinet Do not tear out copies

Homework Synthesis reactions Pg 11 #1-7 Test moved to Friday/Monday

Warm-up Pg 1 # 1 Zinc forms an ionic compound with an oxyanion. The formula is 44.97% Zn and 22.02% S. What is the formula and name of the compound? Answer- ? Mol Zn = g Zn 1 mol Zn= mol= 1 ? Mol S = g S 1 mol S= mol= ? Mol O = ( ) g O1 mol O= mol= g mol g mol g mol Formula: ZnSO 3 Name: Zinc Sulfite

Synthesis Rxns pg 11 in the Packet There are 4 types of synthesis rxns. With your partner read and paraphrase each rxn type. Student A reads # 1 Student B reads #2 Student A reads #3 Student B reads #4 Next, try these examples! 1.Copper (I) is mixed with sulfur 2.Calcium oxide is dissolved in water. 3.Carbon dioxide reacts with iron (II) oxide.

Answers 1. Copper (I) is mixed with sulfur 2Cu(s) + S(s)  Cu 2 S(s) 2. Calcium oxide is dissolved in water. CaO(s) + H 2 O(l)  Ca(OH) 2 (aq) 3. Carbon dioxide is bubbled into an iron (II) oxide solution. CO 2 (g) + FeO(aq)  FeCO 3 (aq)

Mixed Review for the Test next class You will now do a mixed review for all the reaction types we have studied. This is a good indication of test questions. Consider it a test review! You will work with your shoulder partner to answer the questions. You must show your OWN work! Please number all problems. Work will be due at the end of class. The questions will rotate clockwise around the classroom every 3 minutes. If you do not finish a question there will be time at the end to go back to the ones you missed.

Reaction Practice #1 Write the balanced chemical equation with state signifiers for the following reaction: Calcium hydroxide (aq) reacts with phosphoric acid (aq).

Reaction Practice #2 Write the balanced chemical equation with state signifiers for the following reaction: Barium chloride and sodium sulfate react.

Reaction Practice #3 Write the balanced chemical equation with state signifiers for the following reaction: Hydrochloric acid is dripped onto solid calcium carbonate.

Reaction Practice #4 Write the balanced chemical equation for the following reaction: Solid magnesium reacts with iodine vapor.

Reaction Practice #5 Xylitol is a sugar alcohol used in chewing gum. Its chemical formula is C 5 H 7 (OH) 5. Write the balanced chemical equation for the combustion of xylitol.

Reaction Practice #6 Examine the following chemical equations. There are mistakes in the chemical formulas. Correct the mistakes and balance the equations. A)Zn + HCl → ZnCl + H B)CaSO 4 + AlBr 3  CaBr 3 + AlSO 4 C)KPO 4 + HCl 2  KCl 2 + HPO 4

Reaction Practice #7 Write the balanced chemical equation for the following reaction: Chromium(III) perchlorate is heated over a flame.

Reaction Practice #8 Write the balanced chemical equation for the following reaction: Cobalt(IV) carbonate is heated over a flame.

Reaction Practice #9 Write the balanced chemical equation for the following reaction: Bismuth (V) hydroxide is heated over a flame.

Reaction Practice #10 Write the balanced chemical equation for the following reaction: Nickel(I) oxide reacts with water.

Reaction Practice #11 Write the balanced chemical equation for the following reaction: Nickel(I) oxide and carbon dioxide react.

Reaction Practice #12 Write the balanced chemical equation for the following reaction: Sulfur dioxide is bubbled into water.

Reaction Practice #13 Write the balanced chemical equation for the following reaction: Zinc sulfide is electrolyzed.

Reaction Practice #14 Write the balanced chemical equation with state signifiers for the following reaction: Solid magnesium is placed in an iron(III) chloride solution.

Reaction Practice #15 Write the balanced chemical equation with state signifiers for the following reaction: Sulfurous acid is warmed.

Reaction Practice #16 Write the balanced chemical equation with state signifiers for the following reaction: Solid ammonium carbonate is a compound used in baking. Write the reaction that occurs when it is heated.

Reaction Practice #17 Write the balanced chemical equation with state signifiers for the following reaction: Aqueous barium hydroxide and ammonium nitrate are combined.

Reaction Practice #18 Write the balanced chemical equation with state signifiers for the following reaction: Solid aluminum is submerged in a sulfuric acid solution.

Reaction Practice #19 Identify the type of reaction and use the appropriate reference material to determine whether each will occur. a)Na + H 2 O  NaOH + H 2 b)Cu + Zn(NO 3 ) 2  Cu(NO 3 ) 2 + Zn c)Mg(NO 3 ) 2 + K 3 PO 4  Mg 3 (PO 4 ) 2 + KNO 3 d)NaCl + F 2  NaF + Cl 2

Reaction Practice #20 Deoxyribose is the sugar in DNA, deoxyribonucleic acid. Its chemical formula is C 5 H 10 O 4. Write the balanced chemical equation for the combustion of deoxyribose.