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Dvinal [7]
3 years ago
9

Which equation represents the correct net ionic equation for the reaction between Ca(OH)2 and H2SO4?

Chemistry
1 answer:
Georgia [21]3 years ago
7 0

<u>Answer:</u> The correct net ionic equation for the reaction is 2H^{+}(aq)+2OH^{-}(aq)\rightarrow 2H_2O(l)

<u>Explanation:</u>

Net ionic equation is defined as the equations in which spectator ions are not included.

Spectator ions are the ones that are present equally on the reactant and product sides. They do not participate in the reaction.  

The balanced molecular equation is:

Ca(OH)_2(aq)+H_2SO_4(aq)\rightarrow CaSO_4(aq)+2H_2O(l)

The complete ionic equation follows:

Ca^{2+}(aq)+2OH^-(aq)+2H^+(aq)+SO_4^{2-}(aq)\rightarrow 2Ca^{2+}(aq)+SO_4^{2-}(aq)+H_2O(l)

As calcium and sulfate ions are present on both sides of the reaction. Thus, they are considered spectator ions.

The net ionic equation follows:

2H^{+}(aq)+2OH^{-}(aq)\rightarrow 2H_2O(l)

Hence, the correct net ionic equation for the reaction is 2H^{+}(aq)+2OH^{-}(aq)\rightarrow 2H_2O(l)

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how do i solve these equations using proust's law? we haven't gone over balancing chem equations in class and our teacher doesn'
kow [346]

Answer:

Explanation:

Ok so Proust's Law, better known as the Law of Definite Proportions, states that the components of a compound always exist in a fixed ratio. This means that it does not matter what the source of the components are nor the coefficients in front of them. The ratio your teacher is referring to is most likely mass percent/ percent composition. This ratio is the amount of the component over the amount of the entire compound times 100%.

*I am not very familiar with this law so please do with my answers what you will :)*

7.)

First, you want to find the percent composition (aka mass composition) of Na in NaCl.

 45.89 g Na
---------------------  x 100%  =  39.3%
116.89 g NaCl

So, there must be 39.3% sodium in NaCl. You can find how much chlorine is in NaCl by subtracting that percent by 100 (to find the percent composition of chlorine) then multiplying it by the mass.

100% - 39.3% = 60.7%

60.7% / 100 = 0.0607

116.89 g NaCl x 0.0607 = 70.91 g Cl₂

You could also just subtract the mass of sodium from the mass of sodium chloride to find the mass of chlorine.

116.89 g NaCl - 45.89 g Na = 71 g Cl₂

8.)

10.57 g Mg + 6.96 g O₂ = 17.53 g MgO

  6.96 g O₂
---------------------  x 100%  = 39.7% O₂
17.53 g MgO

9.)

6.46 g Pb = 1 g O₂

68.54 g Pb  =  28.76 g O₂

68.54 g Pb / 28.76 g O₂ = 2.83 g ≠ 6.46 g

No, the two samples are not the same because the proportion of lead to oxygen is not the same for both samples. In the first sample, there is 6.46 g lead for every oxygen. In the second sample, there is 2.38 g lead for every oxygen.

6 0
1 year ago
Which feature indicates that Mars resides in the inner region of the solar system?
amm1812

Answer: The correct option is B.

Explanation: There are 2 regions of the solar system.

1) Inner region: There are 4 planets which lie in this region: Mercury, Venus, Earth and Mars. The inner region planets are rocky in nature. The orbit time of these planets around the sun is short. They have 0, 1 or 2 satellites in total. There is no ring system in these planets.

2) Outer region: There are 4 planets which lie in this region: Jupiter, Saturn, Uranus and Neptune. The outer region planets are gaseous in nature. The orbit time of these planets around the sun is long. They have usually more number of satellites around them. Ring system in these planets is very common.

Hence, Mars resides in the inner region of the solar system because it has a rocky surface that one could firmly stand on.

8 0
3 years ago
2 nf3 + 225 kj -&gt; n2 + 3f2 is it exothermic or endothermic
velikii [3]
Due to energy being a reactant instead of a product, the process is endothermic. The system must absorb a quantity of energy before it can react, so it must be an endothermic system.
6 0
3 years ago
Which statements correctly describe the rock cycle? Check all that apply.
pickupchik [31]

Answer: I italicize for checking

  1. <em>Rocks are preserved through the process.</em>
  2. <em>Rocks change from one type to another.</em>
  3. <em>Different rock groups are interrelated.</em>
  4. Rocks change from one type to another in a specific order.
  5. <em>Environmental conditions influence a change in rock type.</em>

Explanation:

Rocks are preserved, as in you can't destroy them completely, but no, they don't <em>stay </em>the same they change.

3 0
3 years ago
In a chemical equation, the new substance that is produced from a chemical reaction is called __________.
aleksandrvk [35]

Answer:

products

Explanation:

yeah the answer is product

6 0
3 years ago
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