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A 500cm3 of solution is prepared by dissolving 0.25g of CaCo3 in excess HCl.Ca2+ ions concentration in the solution in ppm?
What is the total number of moles of ions present in a solution after mixing 125cm3 of 0.2M NaOH and 125cm3 of 1M H2SO4
An aqueous solution K2SO4.Cr(SO4)3.12H2O contains 2.08gdm-3 of Cr3+ ions .what is the SO4^2- concentration in moldm-3 in this solution
How many molecules of iron(III) carbonate does Tina need to react with 5.0 x 10^25 formula
units of HCI? What is the mass of this quantity of iron(Ill) carbonate?
Louisa wants to fill a large balloon with the carbon dioxide that is produced by this reaction.
What mass of hydrochloric acid will she have to use in order to produce a volume of 100. L of
CO2 at STP?
Tina adds 217 g of iron(III) carbonate to a beaker containing HCI. Calculate the mass of iron (II)
chloride and the mass of water that are produced in the reaction.
2 Al + 3 CuCh2 -› 2 AICl, + 3 Cu
Molar masses: 27.0 g/mol Al,
134.5 g/mol CuCh2, 63.5 g/ mol
Cu
Question 1: How many grams of CuCh2 are
necessary to consume 10 g Al?
Question 2: How many grams of Cu will be
produced?
A chemist performed this reaction and
obtained 45.5 g BaSO4. How much HCI
was also produced?
Molar masses: 233.4 g/mol BaSOA,l4
36.5 %mol HCI
A. 9.49 g HCI
C. 5.35 g HCI
B. 388 g HCI
D. 7.12 g HCI
2.50 moles of BaCh4 are reacted. How
many moles of BaSO4 are produced?
A. 2.50 mol BaSO4
B. 3.75 mol BaSO4
C. 1.67 mol BaSO4
D. 5.00 mol BaSO4
3. If 17.3 g SO2 are reacted, how much O2
is consumed?
Molar masses: 32.0 g/mol O2, 64.0 g/molSO2
A. 17.3 g O2
B. 0.135 g O2
C. 0.270 g O2
D. 4.33 g O2
