Question

1 & 6-10

6. When sodium metal is dropped into liquid water, the mixture releases gaseous hydrogen leaving behind a colorless solution of sodium hydroxide, Balance the equation that represents this reaction 2: Liquid butane is often used as a fuel in cigarette ligthers. When the pressure is released, butane evaporates and can burn with oxygen. Balance the following skeletal equation for the reaction of butane with oxygen gas et +O CO HO 3 Balance the following equation; Zn HNO Z NO H 4. Classify each of the following as a decomposition, combination, single-displacement or double-displacement reaction: NU | | | | | | | b. CuClzug) + NazSant Cuso + 2NaClup c. Nisosat Nioss+SOu d. Cao+ PbCr CaCw+ Pb 5. Janelle wants to make paper pulp to be used in a printing project. She needs magnesium sulfite trihydrate, MgSO3.3H20, to bleach the paper pulp. This compound decomposes upon heating. Predict the products and write complete balanced equations foe any reactions. Antonio has two other pieces of metal, cobalt and tin. He also has two aqueous solutions containing their ions, one of cobalt(II) sulphate and one of tin(II)sulfate. Which metal will corrode when placed in one of the solutions? Which solution? Write a balanced equation for the single-displacement reaction where corrosion occurs. 7. Jennifer mixes solutions of cadmium(II) nitrate and sodium sulfide and obtains an orange precipitate that is the pigment cadmium orange. Identify the precipitate and write a balanced equation for the reaction she carried out. 8. Calcium oxide is the white powder, lime. When added to water, it makes slaked lime, which is a solution of the base calcium hydroxide. If sulfuric acid is added to slaked lime, calcium sulfate and water form. Write a complete, balanced equation for the reaction between sulfuric acid and calcium hydroxide. 9. Shellac, used as a transparent coating on wood and other materials, is a suspension of a tree sap (resin) in methanol, CH3OH). The mixture is highly combustible. Write an equation to describe the combustion of methanol. 10. Although soluble barium compounds are toxic in body fluids, barium sulfate is safely used as a contrast agent for X-ray imaging the gastrointestinal (GI) tract because it is! insoluble in water. After a slurry of the compound is ingested, the GI tract becomes visible on an X-ray. Barium sulfate can be prepared by mixing solutions of barium chloride and sodium sulfate. Write balanced molecular, ionic and net ionic equations for the reaction

Answer 1

1) reaction between sodium and water is given below

2Na(s) + 2H2O(l) ---->2 NaOH(aq) + H2(g)

6)
Co and Sn : among these two Co is more reactive than Sn [tin]
So Co will replace Sn from its salt solution
Being less reactive than Co, tin can not displace Co from the
salt solution of Cobalt.
So cobalt will corrode when placed in tin sulfate

the reaction is

Co(s) + SnSO4(aq) ----> CoSO4(aq) + Sn(s)
*******

7)
Cd(NO3)2(aq) + Na2S(aq) ---> CdS (s) + 2NaNO3 (aq)
precipitate formed is cadmium sulfide CdS
*****
8)
H2SO4(aq) + Ca(OH)2 (aq) ----> CaSO4(aq) + 2H2O (l)
*****
9)

2CH3OH (l) + 3 O2 (g)----> 2 CO2(g) + 4 H2O (l)
****
10)
molecular equation for the formation of BaSO4is given below
BaCL2 (aq) + Na2SO4 (aq) ---> BaSo4 (s) + 2 NaCl (aq)

Now spilt compounds in Aq.forms to ions we get

Total ionic equation :

Ba2+ (aq) + 2Cl- (aq) + 2Na+ (aq) +SO42-(aq) ---> BaSO4 (s) +2Cl- (aq) + 2Na+ (aq)

Now cancel spectator ions [2Cl- (aq) , 2Na+ (aq) ] to get

Net ionic equatoon :

Ba2+ (aq) +SO42-(aq) ---> BaSO4 (s)
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Thank you >All solved .kindly up vote