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Is the solution of MgCl2 in water an electrolyte? Select one: a. Yes, because the MgCl2...
MgCl2 is white as a solid and colorless if it dissolves in water. HCl is also...
MgCl2 is white as a solid and colorless if it dissolves in water. HCl is also colorless when it is dissolved in water If Mg is the limiting reagent, at the end of the reaction the solution will be completely transparent but there will be solid MgCl2 at the bottom of the flask. hydrogen gas will continue to bubble through the solution. Adding more HCl will make the reaction start again and produce more product. the solution will be completely...
G of sodium nitrate (NaNO,) dissolves in 100 g of water at 20°C. Is this solution saturated or un...
g of sodium nitrate (NaNO,) dissolves in 100 g of water at 20°C. Is this solution saturated or unsaturated? Wha t would happen if you added ten more grams of sodium nitrate to the solution? What would if you added the ten grams and raised the temperature to 40 C? lution is unsaturated. Adding ten additional grams of solute (NaNO,) would result in a homo geneous solution. Raising the temperature of the solution by 20°C would not affect the solution...
When an ionic compound dissolves in water, the cations and anions are separated. Ions in solution...
When an ionic compound dissolves in water, the cations and anions are separated. Ions in solution will result in that solution conducting electricity, an electrolyte. Some solutions are strong electrolytes while others are weak electrolytes. 1. What do you think is giving rise to electrical conductivity? ions in a crystal 2. This is a diagram showing ions in a crystal. Draw a diagram showing the particles in 1) strong electrolyte, and 2) weak electrolyte. Pay attention to how the water...
Why would adding MgCl2 aliquots to a saturated Mg(OH)2 solution change the pH? a. because MgCl2...
Why would adding MgCl2 aliquots to a saturated Mg(OH)2 solution change the pH? a. because MgCl2 is a strong base O b.because MgCl2 is not water soluble OC. because MgCl2 is a strong acid O d. because of the common ion effect
Compound Conductivity (S/m) Type of Compound Non-, weak or strong electrolyte NaCl 43.00(s/m) Na2CO3 68.53(s/m) NaHCO3...
Compound Conductivity (S/m) Type of Compound Non-, weak or strong electrolyte NaCl 43.00(s/m) Na2CO3 68.53(s/m) NaHCO3 33.24(s/m) KNO3 37.43(s/m) NH4Cl 56.92(s/m) NH3 0.82(s/m) HCl 39.29(s/m) HCN 0.01(s/m) HAc (HC2H3O2) 0.54(s/m) When an ionic solid dissolves in water, water molecules attract the ions causing them to dissociate or come apart. The resulting dissolved ions are electrically charged particles that allow the solution to conduct electricity. Write balanced chemical equations that represent the dissociation or ionization of all compounds in the table...
Enzymes are important to biology because they can be used to Select one: O a. Control...
Enzymes are important to biology because they can be used to Select one: O a. Control when chemical reactions happen O b. Control where chemical reactions occur O c. Link different chemical reactions O d. Couple ATP hydrolysis to activity O e. All of the above Diffusion is the movement of solute propelled by collisions with water. Diffusion spontaneously transforms energy concentration gradients into energy equilibrium conditions just like any other spontaneous reaction. Select one: O a. high; high O...
22 & 23 please QUESTION 22 Which of the following statement(s) about electrolytes are true? 1....
22 & 23 please
QUESTION 22 Which of the following statement(s) about electrolytes are true? 1. Electrolyte solutions conduct electricity because electrons are freely moving through the solution. 2. Electrolyte solutions conduct electricity because ions are moving through the solution 3. When methanol (CH3OH) is dissolved in water, an electrolytic solution results 4. When sulfuric acid acid is dissolved in water, a conducting solution results 5. If an aqueous solution containing sodium chloride is diluted, the conductivity will go down...
Once contaminated, polluted water sources must be treated or they represent a hazard to local residents....
Once contaminated, polluted water sources must be treated or they represent a hazard to local residents. We have mentioned before that lead (Pb2+) ions are a particularly dangerous pollutant. How do we remove ions that we can't even see? Here our understanding of solubility can help. If we add an anion that forms an insoluble salt with Pb2+ ions, we could filter off the solid that forms and remove much of the lead contamination. Use what you know to help....
Which of the following is INCORRECT for Brønsted-Lowry acids and bases? Select one: O a. Water...
Which of the following is INCORRECT for Brønsted-Lowry acids and bases? Select one: O a. Water reacts with itself to form hydronium and hydroxide, a process called autoprotolysis. O b. NH4 is the conjugate acid of the weak base NH3. c. When an acid and a base react, the acid and base neutralize each other and form a salt. Od. Acids are proton donors. e. CH3CN is a protic solvent.
Classify each of the following substances and descriptions as an electrolyte or a nonelectrolyte. Note: If any part of...
Classify each of the following substances and descriptions as an electrolyte or a nonelectrolyte. Note: If any part of this question is answered incorrectly, a single red X will appear indicating that one or more substances have been placed incorrectly. -most molecular solutes -sodium chloride, NaCl -potassium iodine, KI -table sugar -methanol, CH3OH -sodium hydroxide, NaOH -a substance that forms an aqueous solution that does not conduct electricity -a soluble ionic compound
MgCl2 is white as a solid and colorless if it dissolves in water. HCl is also colorless when it is dissolved in water If Mg is the limiting reagent, at the end of the reaction the solution will be completely transparent but there will be solid MgCl2 at the bottom of the flask. hydrogen gas will continue to bubble through the solution. Adding more HCl will make the reaction start again and produce more product. the solution will be completely...
g of sodium nitrate (NaNO,) dissolves in 100 g of water at 20°C. Is this solution saturated or unsaturated? Wha t would happen if you added ten more grams of sodium nitrate to the solution? What would if you added the ten grams and raised the temperature to 40 C? lution is unsaturated. Adding ten additional grams of solute (NaNO,) would result in a homo geneous solution. Raising the temperature of the solution by 20°C would not affect the solution...
When an ionic compound dissolves in water, the cations and anions are separated. Ions in solution will result in that solution conducting electricity, an electrolyte. Some solutions are strong electrolytes while others are weak electrolytes. 1. What do you think is giving rise to electrical conductivity? ions in a crystal 2. This is a diagram showing ions in a crystal. Draw a diagram showing the particles in 1) strong electrolyte, and 2) weak electrolyte. Pay attention to how the water...
Why would adding MgCl2 aliquots to a saturated Mg(OH)2 solution change the pH? a. because MgCl2 is a strong base O b.because MgCl2 is not water soluble OC. because MgCl2 is a strong acid O d. because of the common ion effect
Enzymes are important to biology because they can be used to Select one: O a. Control when chemical reactions happen O b. Control where chemical reactions occur O c. Link different chemical reactions O d. Couple ATP hydrolysis to activity O e. All of the above Diffusion is the movement of solute propelled by collisions with water. Diffusion spontaneously transforms energy concentration gradients into energy equilibrium conditions just like any other spontaneous reaction. Select one: O a. high; high O...
22 & 23 please
QUESTION 22 Which of the following statement(s) about electrolytes are true? 1. Electrolyte solutions conduct electricity because electrons are freely moving through the solution. 2. Electrolyte solutions conduct electricity because ions are moving through the solution 3. When methanol (CH3OH) is dissolved in water, an electrolytic solution results 4. When sulfuric acid acid is dissolved in water, a conducting solution results 5. If an aqueous solution containing sodium chloride is diluted, the conductivity will go down...
Once contaminated, polluted water sources must be treated or they represent a hazard to local residents. We have mentioned before that lead (Pb2+) ions are a particularly dangerous pollutant. How do we remove ions that we can't even see? Here our understanding of solubility can help. If we add an anion that forms an insoluble salt with Pb2+ ions, we could filter off the solid that forms and remove much of the lead contamination. Use what you know to help....
Which of the following is INCORRECT for Brønsted-Lowry acids and bases? Select one: O a. Water reacts with itself to form hydronium and hydroxide, a process called autoprotolysis. O b. NH4 is the conjugate acid of the weak base NH3. c. When an acid and a base react, the acid and base neutralize each other and form a salt. Od. Acids are proton donors. e. CH3CN is a protic solvent.
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