Table 6.6 (neport on Formula Na* CI OH NOj on Name Sodium ion Chloride ion Hydro
ID: 560071 • Letter: T
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Table 6.6 (neport on Formula Na* CI OH NOj on Name Sodium ion Chloride ion Hydroxide ion Nitrate iorn on Name on Formula Ag Cu2* Fe2* Zn2 Silver ion Copper ion Iron ion Zinc ion Questions 1. A student carries out a reaction in which a single reactant gives products. Which of the following statements is true? a- The reaction is a combination reaction. b· The reaction is a decomposition reaction. c- The reaction is a single-replacement reaction. d- The reaction is a double-replacement reaction. e. More than one response is correct. Explain your answer 2. Solid copper carbonate, CuCOs is heated strongly in a test tube. The solid is observed to agitate vigorously and change color from gray-green to black during the heating. A glowing splint im- mediately goes out when inserted into the mouth of the test tube during the heating. Which of the following equations for the decomposition reaction that took place is consistent with the observations? a. CuCO,(s) CuCo(s) +0 (g) b. 2Cuco,(s) 2Cu(s) +2C(s) + 302 (g) c. Cuco,(s)-CuO(s) + CO2(g) Explain your answer: ©2014 Cengagt Laarang.ABR ghts Reserved May not be scanned, epiedothdamd. or posted toaphlity accessible white, insbole or un partExplanation / Answer
1. the answer is B the reaction is decomnposition reaction.
During decomposition reaction, a single reactant decomposes to form two or more products
2. The answer is C CuCO3(s) + heat CuO(s) + CO2(g)
AS CuO is black in colour which is observed during reaction
3. The answer is B and C As spectator ions ions are those ions remains as such during the course of reaction.
4. The answer is C it contains NaNO3
as with NaCl, AgCl (white) would have precipitated
with NaOH, AgOH (Brown) would have precipitated
5. The answer is b the solid would not form
As NaOH and NaCl give re-ective ions in solutions
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