1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
g100num [7]
3 years ago
15

If 3.68 grams of zinc were allowed to react with excess hydrochloric acid to produce zinc chloride and hydrogen gas, how much zi

nc chloride should be produced?
Suppose that 7.12 grams of zinc chloride is actually recovered, what is the per cent yield?

​
Chemistry
1 answer:
AysviL [449]3 years ago
6 0

Answer:

Here... Since there is excess HCl, you know the Zinc will be the limiting reagent.  I was able to create the reaction equation based on the info you gave: Z + 2HCl ----> ZCl2 +2H.  Now, in order to find the theoretical yield of ZCl, you need to convert Zinc from grams to moles.  Do this by dividing by its molar mass (65.38), thus: 3.68 (g) / 65.38 (g/mol) = 0.056286... moles.  

Now, using the balanced equation we made earlier, we see that 1 mole of Zinc creates 1 mole of ZCl2.  Thus our ratio is 1:1.  This makes the next step easy.  Since it is 1:1, we multiply the number of moles we have of Zinc (0.056286...) by the number of moles it will create of ZCl (1).  (0.056286)(1) = 0.056286 moles ZCl.  Now convert this to grams by multiplying by its molar mass (136.28) and you get 7.67 grams.  This is your theoretical yield.  The percent yield is found by dividing the actual amount obtained (7.12 g.) by the theoretical yield (7.67 g.) then multiply that by 100%.   When this is done, your Percent Yield is about 92.8%

You might be interested in
Charles’ law explains which of these phenomena?
irakobra [83]
The answer is A. <span>why a balloon deflates when the air around it cools </span>
8 0
3 years ago
Read 2 more answers
Why are atoms of lithium, sodium, and potassium almost neverfound alone in nature
yuradex [85]
<span> The Alkali elements are so reactive that they are </span><span>never found alone in nature</span>
6 0
3 years ago
Read 2 more answers
Write a balanced equation between oxalic acid and potassium hydroxide ​
Salsk061 [2.6K]
2 KOH(aq) + H2C2O4(s) → K2C2O4(aq) + 2 H2O(l) When a sample of oxalic acid (H2C2O4), which is a diprotic acid (both H-atoms are acidic), is titrated with 0.250 M potassium hydroxide solution, 24.66 mL of the potassium hydroxide solution are required to neutralize the acid. I don’t know is this gonna help but ok ._.
4 0
2 years ago
What is the effect of tap water, sea water, and rainwater on the rusting rate of iron?
UkoKoshka [18]

Answer:

The more acidic the solution the faster it rusts. More Na = more rust

Explanation:

4 0
2 years ago
What is a hypothesis
zmey [24]
<span>A supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.</span>
4 0
3 years ago
Read 2 more answers
Other questions:
  • Which phase of matter consists of particles that are held together but have the ability to flow past each other?
    12·2 answers
  • What do scientists use to increase the surface area of a solute? heat a beaker a mortar and pestle a flask a stir bar
    11·2 answers
  • Write a brief account of Ernest Rutherford’s personal and professional life in no more then 150 words
    8·1 answer
  • Murphy built a simple motor with a battery, permanent magnet, copper coil of wire and iron bar. When the motor is turned on, the
    9·1 answer
  • What symbol is used for a beta particle?
    5·2 answers
  • A sample of gas in a syringe has a volume of 9.66 mL at a pressure of
    12·1 answer
  • Cold air rises and warm air sinks. True or False
    6·1 answer
  • How do jet streams affect temperature and precipitation?
    12·1 answer
  • Which method would be BEST for separating a mixture of black pepper and water? * 1 point A. Condensation B. Sieving C. Filtratio
    9·1 answer
  • Can The collision of continental plates can push up a mountain range, after which weathering and erosion begins?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!