A. Experiments involving heating Classification 1 ______Mg(s) + ______O2(g) ____

Question

A. Experiments involving heating Classification 1 ______Mg(s) + ______O2(g) ______MgO Observations after heating the magnesium metal: What happened to the product after adding water?

2 ______CaCO3 (s) ? ________CaO + ________CO2 Observations: What happened to the color of the indicator when you blew into the solution??

3. ______H2O2 (aq) ________________________________ Observations: In the reaction above, why is the MnO2 written above the arrow.

4. Calcium acetate is a substance that provides a gel that will hold the ethanol, it does not actually participate in the following reaction. Observation before igniting: _______C2H5OH + _______O2 ? __________________________ Observations after igniting:

B. Single Replacement Reactions 1. ____CuSO4 (aq) + ____Zn (s) ? _____Cu (s) + _____ZnSO4 (aq) Observations: 2. ____HCl (aq)+ _____Zn(s) ? ___________________________ Observations: 3. ____H2O (l) + ____Ca (s) ? ______Ca(OH)2 (s) + _____H2 (g) Observations before adding universal indicator: Observations after adding universal indicator:

C. Double Replacement Reactions 1. ____HCl (aq) + ____Na2CO3 (aq) ? ____H2CO3 (aq) + ___NaCl (aq) _____ H2CO3 (aq) ? ___________________________________________ Full Equation: ___________________________________________________________ Observations:

2. ____H2SO4 (aq) + ____NaOH (aq) ? ____Na2SO4 (aq) + ____H2O (l) Temperature of acid before mixing: ___________ after mixing: ___________ Observations:

3. ____Pb(NO3)2 (aq) + ____KI (aq) ? _________________________ Observations:

Explanation / Answer

1. Magnesium oxide(MgO) ash is formed, If water is added to the Ash then it forms Mg(OH)2

2Mg + O2 ---------> 2MgO

MgO+H2O-------->Mg(OH)2

4.

B.Zn is more reactive than copper So it can displace from its compound.

Zn(S) + 2HCl(aq) ----------->ZnCl2(aq)+ H 2(g)

After adding the indicator, it changes into dark purple colour.

C. 2 HCl(aq)+Na2CO3(aq) ---------->2NaCl(aq) + H2O(l)+Co2(g)

2. All Acid Base Reactions are Exothermic reactions.So After the reaction temperature is increased.

3. Pb(NO3)2(aq)+2KI(aq)-----------> PbI2(s)+2KNO3(aq)

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