Chem Ch8 Quiz
How many grams of CaCl2 are present in 20.0 mL of a .510 M solution?
(0.510 moles CaCl2 / 1 L solution) x (1 L / 1000 mL) x (20 mL) = 0.0102 moles CaCl2 use molar mass to convert to grams (0.0102 moles CaCl2) x (110.98 g CaCl2 / 1 mole CaCl2) = 1.13 g CaCl2
What is the concentration in % (m/m) of a solution prepared by mixing 12.0g of KCl with 109.0g of distilled water?
12g KCl + 109 g of distilled water = 121g 12g of KCl/121g of mass solution = 9.92%
A 750 mL bottle of wine contains 14% ethanol. How many mililiters of ethanol are in the bottle of wine?
14/100= .14 .14 • 750 = 105 Round to 2 sig figs =110 mL
What is the % (m/v) concentration of a 6.4 M NaOH solution?
26% I didn't under this so I don't know how to get to that answer 😂
If a patient receives 295 mL of the IV solution, how many moles of K+ were delivered?
295 ml x1 L/1000 ml = 0.295 L 0.295 L x 35 mEq K+/L = 10.32 mEq K+ 10.32 mEq K+ x 1 mmol/mEq = 0.013 moles K+
Calculate mass/volume (m/v) 43g of sucrose in 300 mL of a carbonated drink
43g/300 mL = .1433 .1433•100% =14.3% Round to 2 Sig Figs = 14%
How many mL of a .5%(m/v) KCl solution can be prepared from 550 mL of a 9.5% (m/v) stock solution?
500 ml * .095 = X * .005 47.5 = .005x X = 47.5/ .005 = 9500 mL Round to 2 Sig Figs Round up to 10000 answer = 1.0 x 10^4
Calculate mass/volume (m/v) 71g of Na2SO4 in 270 mL of Na2SO4
71g/270 mL =.2629 .2629•100% =26.3%
Will a red blood cell undergo crenation, lysis, or no change in the following solutions? A) 10% (m/v) NaCl B)distilled water C) 5% (m/v) NaCl D) 5% (m/v) glucose
A) crenation B)lysis C)crenation D)no change
A)If the temperature of a solution decreases, the solubility of a gaseous solute will_________ B)If the temperature of a solution decreases, the solubility of a solid solute will_________ C)If the pressure of a solution decreases, the solubility of a gaseous solute will_________
A)Increase B)Decrease C)Decrease
How would you prepare 500 mL of a 5% D5W solution from a 30% stock solution?
Add 83 mL of the stock solution (30% m/v) to enough water to make 500 mL
Hypertonic or Hypotonic if the solute is being transported across the cell membrane
Facilitated transport-hypertonic Passive diffusion-hypertonic Active transport- hypotonic
FeCl3, balanced equation for hydration in water
FeCl^3 (s) —> Fe^3+ (aq) + 3Cl^- (aq)
The normal range for blood hemoglobin in females is 12-16g/dL. What is the value in % (m/v)?
I have no explanation to this other than it's 12%-16%
What must be happening to the kidneys membrane filters if such large molecules are found in the urine?
In a normal kidney, only small molecules pass through the glomeruli (kidneys semipermeable membrane). If larger molecules are able to pass through the membrane, the pores in the membrane are larger than normal, an indication of kidney disease.
K2SO4, balanced equation for hydration in water
K2SO4 (s) —> 2K^+ (aq) + SO4^2- (aq)
NaHCO3, balanced equation for hydration in water
NaHCO3 (s)—> Na^+ (aq) + HCO3^- (aq)
Types of Transport
Nitrogen-passive transport Cholesterol-passive transport Cl- facilitated transport H+ active transport
Identify the following as solutions or colloids.
Salt water- Dolution Kool-Aid- Solution Cheddar Cheese- Colloid
