Concept explainers
Interpretation:
The
Concept Information:
Acid ionization constant
The equilibrium expression for the reaction
Where
Base ionization constant
The equilibrium expression for the ionization of weak base
Where,
Relationship between
Where
To Calculate: The
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Chemistry: Atoms First
- (a) Atoms are very small compared to objects on the macroscopic scale. The radius of a aluminum atom is 143 pm. What is this value in meters and in centimeters? m cm (b) The mass of a single aluminum atom is 4.48×10-23 g. Suppose enough Al atoms were lined up like beads on a string to span a distance of 37.7 cm (15 inches). How many atoms would be required? atoms What mass in grams of Al would be used? g Could you weigh out this amount of aluminum using a typical laboratory balance? (c) Taking the density of aluminum metal to be 2.70 g/cm³, calculate the mass of metal needed to form a piece of Al wire with the same length as the distance in b, but with a diameter of 1.00 mm. Hint: The volume of a cylinder is n times its radius squared times its height. (V = n r² h) How many aluminum atoms does this represent? g atomsarrow_forward3.15 (a) and (b) please help!arrow_forwardDetermine which of the following isarrow_forward
- (acids/bases)Distinguish between strong/weak and concentrated/dilute:arrow_forward12. (b) A student knew that calcium hydroxide could be made by adding calcium to water. The student added 0.00131 mol of calcium to a beaker containing about 100 cm of water. A reaction took place as shown by the equation below, All the calcium hydroxide formed was soluble. Ca(s) + 2H,0(1I) → Ca(OH) (aq) + H,(g) (D Calculate the mass of calcium that the student added. mass of calcium = g (ii) Calculate the volume of hydrogen gas, in dm3, produced in this reaction at room temperature and pressure, RTP. volume of hydrogen gas = dm3 (iii) The student transferred the contents of the beaker to a 250 cm3 volumetric flask and water was added to make the solution up to 250 cm³. Calculate the concentration, in mol dm3, of hydroxide ions in the 250 cm³ solution. concentration = moldm 3arrow_forwardComplete the following table for citric acid, C6H8O7 , the acid found in many citrus fruits.arrow_forward
- Mass of 0.1 mole of methane is (a) 1.6 g (b) 0.1 g (c) 1g (d) 16 garrow_forward(b) (i) Salbutamol, which is used in ventolin inhaler to relieve asthma, has the structural formula as shown below. Write all the chemical equations involved when salbutamol is: HO. OHarrow_forwardQ. 1) Complete and balanced the following chemical equations. ASsume complete reaction and indicate physical states. (а) NH2OH (aq) + H2SeO4 (aq) → (b) 2 N2 (g) + 5_ 02 (g) → 2 (g) + 2 H2O (1)|→ (c) (CH3):ССH(CO-H)2 (s) + O2 (g) → (d) НЗASO4 (aq) + Sr(OH)2 (aq) →arrow_forward
- 2) OH (e) (f) (d)arrow_forwardA)Write the correct formula of copper (II) sulfate pentahydrate. (b) Calculate the theoretical percentage of water in Manganese (II) sulfate heptahydrate to four significant figures. You must show all calculations clearly to get full credit.arrow_forwardA sample contains one or more of the ions: aluminum, calcium, copper(II), iron(III); upon addition of NH3, after centrifuging, it looks like the picture shown below. For each metal put in the correct letter: P = definitely present, A = definitely absent, U = uncertain, can't tell if present or absent. aluminum = calcium = copper = iron =arrow_forward
- General Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage Learning