What is the concentration of the final solution when 50 mL of 2.0 M HNO_3, is ad
ID: 525310 • Letter: W
Question
What is the concentration of the final solution when 50 mL of 2.0 M HNO_3, is added to 100 mL. of water? (A) 0.34 M (B) 0.50 M (c) 0.67 M (D) 1.0 M What is the molarity of 1000. mL solution of 5.8% (w/v) NaCl? (A) 0.0010 M (B) 0.060 M (C) 1.0 M (D) 60 M Which statement is not true about an acid? (A) Substances that are classified as acids taste sour. (B) Red litmus paper turns blue for an acid. (C) The pH of an acid is less than 7. (D) Acids donate hydrogen ions (H^+). What are the spectator ions in this reaction? BaCl_2 (aq) + Na_2 SO_4 (aq) rightarrow BaSO_4 (s) + 2NaCl (aq) (A) Ba^2 + and Na^+ (B) Ba^2- and SO^2- _4 (C) Cl^- and SO^2- _4 A catalyst will (A) decrease the reaction's rate. (B) lower the activation energy of the reaction. (C) not change the rate at which the equilibrium is established. D) be consumed in the reaction. Which describes matter in the gaseous state? (A) Gases move in an orderly fashion. (B) Gases have a definite shape and volume. (C) Smaller gas molecules move slower than larger ones (D) increasing the temperature increases the kinetic energy of the gas molecules. Which is not an example of a colligative property for Solution. (A) boiling point elevation (B) osmotic press (C) freezing point depression (D) solubility Crenation of a cell occurs in _______ solution. (A) a hypotonic (B) a hypertonic (C) an isotonic (D)Explanation / Answer
26) Answer:
HNO3 volume (V1) = 50 mL
HNO3 concentration (M1) = 2 M
Added water volume (V) = 100 mL.
Final solution concentration (M2) = ?
M1V1 = M2V2
V2 = Final volume = V1 + V
V2 = 50 + 100 = 150 mL
M1V1 = M2V2
2 x 50 = M2 x 150
100 = M2 x 150
M2 = 100/150
M2 = 0.666 M
27) Answer:
volume = 1000 mL
weight % = 5.8
Molarity = ?
solute is the NaCl and its molar mass = 58.4
we know that
Molarity = (solute weight % x 10) / molar mass of solute
M = (5.8 x 10) / 58.4
M = 0.993
28) Answer: (B)
Explanation:
Bases turns the Red litmus in to Blue.
29) Answer: (D)
Explanation:
The Ions which are unchanged in the reactants and products are called spectator ions.
In the reaction Na+ and Cl- both sides are in aqueous state means they are in Ionic state. So these are the spectators.
BaSO4 is the solid in the reaction means it is precipitated.
30) Answer: (B)
Explanation:
Catalyst always lower the activation energy of the reactants and we can recollect the catalyst quantitatively after the reaction also.
31) Answer: (D)
32) Answer: (D)
33)Answer: (B)
Explanation:
Solvent always moves from lower concentration to higher concentration.
In Hyper tonic solution the concentration is more, If the cell is placed in that solution the solvent of the cell comeout then the cell undergo shrinkage (Crenation).
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