Substance 20∘C 50∘C KCl 34.0 42.6 NaNO3 88.0 114.0 C12H22O11 (sugar) 203.9 260.4 Using the above table, determine whether each of the following solutions will be saturated or unsaturated at 50 ∘C. 1.) Adding 19.7 g KCl to 35.0 g H2O 2.)Adding 184 g NaNO3 to 75.0 g H2O
3.)Adding 87.8 g sugar to 25.0 g H2O
-
For KCl at 50 C. 42.6 g KCl x (35.0g H2O/100 g H2O) = 14.9 which means 14.9 g KCl can be dissolved in 35.0 g H2O. That means it will be saturated since 19.7 g KCl is greater than what will dissolve.
2 and 3 are done the same way.
-
When solutions of KCl and Pb(NO3)2 are mixed, a precipitate forms. Which of the following is the balanced equation for the double replacement reaction that occurs? a. KCl(aq) + Pb(NO3)2 (aq) �¨ KNO3 (aq) + PbCl2 (s) b. KNO3 (aq) + PbCl2 (s) �¨ KCl(aq)
-
A sugar crystal contains approximately 1.7×10^17 sucrose (C12H22O11) molecules What is its mass in mg?
-
KCl(s) → K+(aq) + Cl‾ (aq) Solid KCl dissolves as shown in the above equation. A 6.60 g sample of KCl was dissolved in 42.3 g of water. The initial temperature of the water was 21.90°C. After the compound dissolved, the temperature of the water was
-
The initial amount of sugar in fermenting a batch of beer is 5.5grams. Over time the sugar decreases at a rate of 0.1grams per day. a. what is the amount of sugar that remains after 7 days? 23days? b. If A represents the amount of sugar, write an equation
-
How many grams of KCl are produced by the thermal decomposition of KClO3 that produces 25mL of O2 at 25 degrees and at 1 atm? A)0.0508 B)0.0762 C)0.0835 D)0.125 what is the anwser and what equation would i use to get the anwser? Write the balanced equation
-
The initial amount of sugar in fermenting a batch of beer is 5.5 grams. Over time the sugar decreases at a rate of 0.1grams per day. a.What is the amount of sugar that remains after 7 days? 23 days? - I got: 5.5-0.1x= A - 5.5-0.1(7)= 4.8 - 5.5-0.1(23)= 3.2
-
which amount of a compound dissolved in 110.g of water at the stated temperature represents a solution that is saturated? (1)20g KClO3 at 80 C (2)40g KNO3 at 25 C (3)40 g KCl at 60 C (4)60 g NaNO3 at 40 C
-
a solution is prepared with 3.26g kcl and water to make 25.0ml,of kcl,what is the %(m/V) of the kcl solution.
-
A salt solution can be acidic, basic, or neutral. when dissolved in water, which of the following salts will not affect the pH: KCl, FeCl3, NaNO3, CaCO3, LiF, and NH4Br?
-
Which best describes solubility? the speed at which a substance dissolves the ability of one substance to dissolve in another the amount of surface area per a given mass the temperature at which subtances become a mixture
-
Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 5.00-g sample is burned, and 2.50 g of CO2(g) is produced. What is the mass percentage of the table salt in the mixture
-
if more sugar is placed into a glass of iced tea than can dissolve in the te,the additional sugar will sink to the bottom of the iced tea. Which of the following statements best accounts for the observation that an oversupply of sugar crystals will collect