![]() ![]() In fact, you can tell that if an acid (which is itself dissolved in some water) dissolves a metal, the metal has become a cation (which dissolves well in water!), i.e. Hydrogen naturally exists as the diatomic gas, #"H"_2(g)#.Sulfuric acid is a sulfur-based acid with the "sulfate" polyatomic anion, #"SO"_4^(2-)#, so this is a diprotic acid, #"H"_2"SO"_4#.Aluminum implies #"Al"(s)#, the metal element.It is also a single-replacement reaction, of the form #a)# Generally when you start with a pure metal and get a gas, it is a redox reaction. The concepts are very similar in each of these problems, except for #(3)#, which is a dilution. #4)# For the reaction of potassium sulfide and cobalt (II) nitrate, #(a)# write the balanced chemical reaction, #(b)# determine the limiting reagent and find the mass in #"g"# of cobalt (II) sulfide formed from the reaction of #"175 mL"# of #"0.225 M"# potassium sulfide with #"250 mL"# of #"0.180 M"# cobalt (II) nitrate. #3)# How much water do you predict would have to be added to dilute a #"3.0 M"# aqueous solution of #"HCl"# to yield #"100.0 mL"# of a #"0.135 M"# solution? Assume additivity of solution volumes. #2)# For the reaction of phosphoricacid with magnesium hydroxide, #(a)# write the balanced reaction, and #(b)# find the mass in #"g"# of magnesium hydroxide that would react with #"25.00 mL"# of #"0.4376 M"# of phosphoric acid. sulfuric acid, #(a)# balance the reaction, #(b)# determine the volume in #"L"# of #"H"_2# produced if #"10.00 g"# of #"Al"# reacts with excess acid, and #(c)# determine the mass in #"g"# of #"Al"(s)# that #"25.00 mL"# of #"1.244 M H"_2"SO"_4# should react with. #1)# For the reaction of aluminum with conc. ![]()
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