Will a double replacement reaction occur if a potassium hydroxide solution is mixed with a lead(II) nitrate solution? Briefly explain.

Answers

Answer 1

Answer:

Explanation:

A chemical reaction equation that contains same number of atoms on both reactant and product side is known as a balanced chemical reaction equation.

And, when positive and negative ions of the two reactant species exchange their position then this type of reaction is known as double replacement reaction.

For example, $KOH + Pb(NO_(3))_(2) \rightarrow KNO_(3) + Pb(OH)_(2)$

Here, number of reactant molecules are as follows.

K = 1

OH = 1

Pb = 1

$NO_(3)$ = 2

Number of product molecules are as follows.

K = 1

OH = 2

Pb = 1

$NO_(3)$ = 1

Hence, to balance this equation multiply KOH by 2 on reactant side and multiply $KNO_(3)$ by 2 on product side.

Therefore, the balanced chemical reaction equation is as follows.

$2KOH + Pb(NO_(3))_(2) \rightarrow 2KNO_(3) + Pb(OH)_(2)$

Since, both positive and negative ions on the reactant side get exchanged. Hence, it is a double replacement reaction.

Answer 2

Answer: No - a precipitation will occur though. Potassium nitrate is soluble in water, so the potassium and nitrate ions will remain spectator ions and stay in solution. Lead (II) hydroxide is not soluble, and will precipitate out of solution to form a solid product.

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Which of the following examples depict(s) a physical property?

Answers

Answer:

$\boxed {\tt D. \ All \ of \ the \ above }$

Explanation:

A physical property is a property that can be observed without changing the composition.

Some examples of physical properties are:

Color
Density
Length
Mass
Smell
Temperature
Boiling Point
Hardness

Now, let's examine our answer choices.

Choice A: Sugar is white in color

The property is color, which is a physical property.

Choice B: Iron is more dense than aluminum

The property is density, which is a physical property.

Choice C: Diamond is harder than graphite.

The property is hardness, which is a physical property.

Since all three choices depict physical properties, the best choice is D. All of the above.

Answer:

Explanation:

All explain physical no chemical examples were given

The solubility of KCLO3 (s) in water increases as the.....

Answers

The solubility of potassium chlorate (KCLO3) increases as the temperature increase. The increase in temperature is only applicable for most ionic and molecular solids. Since potassium chlorate is an ionic compound, this rule applies to it. The solubility however of other substance such as NaCl doesn’t change when you increase its temperature.

In a play, the rising action consists of the events that lead up to the a. last line in the scene
b. climax
c. external conflict
d. internal conflict

Answers

The rising action, which follows the expositions, comes just before the climax.

THE ANSWER IS THE RISING ACTION THEN I THINK GO TO INTERNAL CONFLICT THEN THE CLIMAX

. A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl2 in this solution is __________ molar. a. 0.564
b. 0.571
c. 0.569
d. 0.537
e. 0.214

Answers

Answer:

The concentration of CaCl2 in this solution is 0.564 molar (option A)

Explanation:

Step 1: Data given

Mass of CaCl2 = 23.7 grams

Mass of water = 375 grams

Density of solution is 1.05 g/mL

Step 2: Calculate total mass

Total mass = mass of CaCl2 + mass of water

Total mass = 23.7 grams + 375 grams = 398.7 grams

Step 3: Calculate volume of the solution

Density = mass / volume

Volume = mass / density

Volume = 398.7 grams / 1.05 g/mL

Volume = 379.7 mL = 0.3797 L

Step 4: Calculate moles CaCl2

Moles CaCl2 = mass CaCl2 / molar mass CaCl2

Moles CaCl2 = 23.7 grams / 110.98 g/mol

Moles CaCl2 = 0.214 moles

Step 5: Calculate concentration

Concentration of CaCl2 = moles / volume

Concentration of CaCl2 = 0.214 moles / 0.3797 L

Concentration of CaCl2 = 0.564 mol / L = 0.564 molar

The concentration of CaCl2 in this solution is 0.564 molar (option A)

Which of the following elements will likely form a negative ion in its ionic compounds?a. Li, lithium
c. Mg, magnesium
b. Al, aluminum
d. Cl, chlorine

Answers

It's (D), Cl, chlorine, the others can't form ions

c) Mg, magnesium is the answer

Show a numerical setup for calculating the percent by mass of NaCl in the solution inbeaker 4.

Answers

Let's think about the solution first: it's composed of water (100 g) and 35.04 grams of NaCl (in beaker for)

together it's 100+35.04=135.04

and NaCl in this solution is 35.04/135.04=25.95.

So the answer is 25.95

Mass Percentage Definition. Mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture. Mass percentage is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100%.
% mass = [( 35.04) / ( 100 + 35.04)] * 100
% mass = 25.95 %

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