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In a reaction between Mg and hydrochloric acid:
Mg(s) + HCl(aq) —> MgCl2(aq) + H2(g)
Given the data below. Examine the data. What is the average rate of reaction?
Time
2
6
8
Mass of Magnesium
0.012
0.010
0.006
0.004
8. What is [H3O+] for a 0.500 M solution of hydrochloric acid? Make sure you include the ionization equation. (2 marks)
9. If 2.50g of the strong base lithium hydroxide is dissolved in 1.50 L of solution, what is the concentration of hydroxide ions? Make sure you include the dissociation equation. (3 marks)?
7. The following substances will get mixed together. One will act as a Bronsted-Lowry acid and the other will act as the Bronsted-Lowry base.]
i) Write the equilibrium reaction that will occur when they are mixed. (2 marks)
ii) Label the acid and base in the reactant side (1 mark)
iii) Label the conjugate acid and conjugate base in the product side (1 mark)
a. HCN and F
b. HPO4 2- and SO4 2-
(a) The following set of lead determinations on separate aliquots of a pooled blood serum were reported: 103, 106, 107, and 114 meq/L. One value appears suspect. Should the suspected be retained or discarded at 95% confidence level.
- A gas has a pressure of 699.0 mm Hg at 313 K. What is the temperature at standard pressure 760 mmHg?
A 10cm long cleaned Magnesium strip is heated in a crucible until get a fixed mass.if the weight of the crucible is 15.65g and the weight of magnesium strip with crucible is 16.13g,the mass of oxide in grams
Write the equilibrium constant expression for each of the following reactions.
1. H2(g) + I2(g) ⇌ 2HI(g)
2. 3O2(g) ⇌ 2O3(g)
3. 2CO2(g) ⇌ 2CO(g) + O2(g)
4. CH3COOH(aq) + C2H5OH ⇌ CH3COOC2H5(aq) + H2O(l)
5. AgCl(s) ⇌ Ag+ (aq) + Cl-(aq)
metal block has a mass of 50g and a volume of 10 cm what is the density of the block
Given the electrochemical equivalent of a metal (m^2+) as 3.6x10^-3.
determine the relative atomic mass of the metal M.
what quantity of electricity will liberate 20g of this metal? (f = 96500)
Convert 37 (µmol/L) of sulphate to mg/l.
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#339914 on Dec 2023