Research work and presentation for elementary grades "how to grow salt crystals at home". Presentation "Growing crystals from sugar and salt Presentation on the topic of a crystal from salt
Object of research: crystals. Hypothesis: the crystal can be grown at home. Subject of study: artificial crystal growth Practical goal: 1. Creation of printed material and slide presentation about crystals. 2. Growing a crystal Research objectives: 1. To study and analyze the literature on this topic. 2.Grow a crystal at home. Research methods: generalization, analysis, observation, questioning, experience. Practical significance: the created printed and multimedia materials and the crystal can be used in OM lessons
Emerald diamond garnet Natural crystals have always aroused people's curiosity. Their color, brilliance and shape affected the human sense of beauty, and people decorated themselves and their homes with them. Since ancient times, crystals have amazed the human imagination with their exceptional geometric perfection. Our ancestors saw in them the creations of angels or underground spirits. The crystals look like they were specially cut, polished and painted by someone.
Crystal lattice Features of crystals are associated with a strict order of arrangement of atoms in space. That is why the crystals have a strict but beautiful shape. Correct location atoms in a crystal is called the crystal lattice. It can be represented as a grid in which atoms of the chemical elements that make up a given substance are located at equal distances from each other.
Growing crystals from salt and sugar. We fill the jar hot water and add sugar, salt to it until the crystals cease to dissolve. The role of the seed can be played by an ordinary thread or a pebble. We fix the thread on a pencil and put it across the neck. We put everything on the windowsill. After 6 days, the first crystals of salt and sugar appear on the thread. After a week, the crystals reach a size of 2-3 mm. Every day there are more and more of them. They are shaped like a cube.
Growing a semi-precious carnelian crystal from solution. I took the chemical reagent ammonium dihydrogen phosphate and dissolved it in water at t = 60 ºC. Launched a seed in the form of a pebble. I put it on the windowsill. The first crystals appeared after 15 days. They were very small, in the form of needles. I conducted this experiment in two containers. In the first container, I interrupted the experiment as soon as the first crystals appeared. And in the second - I watched to the end, when all the water evaporated, then large, beautiful crystals appeared. It was interesting to watch. The crystals grew within a month. Using the same technology, I grew green and red crystals.
Conclusions research work, it can be argued that the proposed hypothesis was confirmed. Based on the experiments, I made the following conclusions: 1. The growth of crystals depends on the temperature: the higher the temperature, the faster the crystals grow. 2.Growing crystals, depends on the intensity of evaporation.
Literature 1. Ivanyushkina D. What are crystals? Qiddycome Sobolevsky V.I. Wonderful minerals. M.: Enlightenment, Modern crystallography. M., 1979 - 1981m-crystals_0.htmm-crystals_0.htm
The purpose of the study is to grow crystals at home. The object of our
research will
three aqueous solutions:
"Sugar", "Salt" and
"Copper vitriol".
Tasks:
find literature on the topic;conduct a survey of classmates;
purchase the necessary materials for
research;
execute practical work and do
conclusion
arrange a job
prepare presentation and defense Research methods:
1. study
literature;
Hypothesis: I
2. experiment;
I assume that in
at home
3. observation;
it is possible to grow
4. questioning;
crystals and try
5. analysis of results
prove it. crystals are
substances in which
tiny particles
packed in
certain
okay. It is this
order and determine
crystal shape. No crystals
many can work
complex devices
for processing,
transmission and storage
information.
At the same time, with the same
amazing
substances, we
we even face
when we drink tea To start
research we
took three dry
Substances "Sugar",
"Salt", "Copper
vitriol." For
compliance with technology
security
used
protective gloves.
In three different
containers with warm
we dissolved with water
dry matter According to our observations,
fastest
sugar dissolved, then
salt and only copper
vitriol after a long
mixing.
After that we are part
each substance
tied to a string and
dropped them into
corresponding
solution
After 10 days, the first check was carried out
put forwardhypothesis,
confirmed.
crystal can
grow in
at home,
but this requires
study the process
formations.
My conclusions
1. Crystal growth begins when there iscenter of crystallization, for example in the form of a small
crystals (seeds).
2.Before lowering the seed into the solution, the solution
needs to be chilled.
3.Growing crystals depends on the intensity
water evaporation and temperature: the higher
temperature, the faster the crystals grow.
4. If crystallization is very slow,
it turns out one large crystal, if quickly a lot of small crystals.
5. In the place where the crystals are grown, there should not be
be vibration.
Analysis of student surveys
What do you think crystals are?(Precious stones, Ingots of salts and minerals, Pebbles, Mountain
breed, Chemical substances, Jewelry, Frozen drops)
Where did they come from? (From earth, From water, From minerals, From mountains
From caves, from diamonds, from drops)
Where are crystals used? (In jewelry and
in jewelry, in research, in rings, in science, in stores)
Have you grown crystals at home?
(no - 10 people, from crystal growing kits - 4,)
CONCLUSION: my classmates
have little understanding of crystals During the study
my hypothesis
confirmed. AT
at home
it is possible to grow
many white crystals
similar to winter
twig" from a solution
salt. But the most
amazing and
big crystal
grew up in copper
vitriol, which means the goal
research
reached.
Growing crystals at home The work was completed by: Abrashkin Artem MBOU - cadet school No. 95, Samara
The theme of my work was prompted by nature itself. During the Christmas holidays in the Bashkir sanatorium YANGAN-TAU, my mother and I admired the winter park at Christmas. And we saw this miracle at our dacha: these are ornamental cabbage flowers. The autumn night frost has grown magnificent crystals on them. . Can we grow such beauty?
So the theme of the experiment was chosen: "Growing crystals at home." Purpose: to learn how to grow salt crystals and copper sulfate at home. Tasks: Collect information about crystals; Pick up affordable equipment and raw materials for growing crystals at home; Familiarize yourself with safety measures when conducting experiments; Grow salt crystals and copper sulfate. What are crystals? Crystals, translated from Greek, krystallos - ice, solids, the molecules of which form a crystal lattice. I learned from books that crystals are made in the laboratory, but crystals are also found in nature.
Crystals in nature are different shapes
I found out that at home you can grow crystals of salt, sugar, soda, copper sulfate. From a salt solution, you can get transparent crystals, because the salt has no color. And copper sulfate is a blue powder, and a colored crystal can be obtained from it. I'm going to experience
Required components Salt and copper sulphate powder, utensils for growing crystals (glasses), a spoon, distilled water, two nuts with threads, a funnel and filter paper, scissors, toothpicks. Prepare a saturated saline solution and a solution of copper sulfate. Dissolve in water until you are sure that it no longer dissolves (the solution is saturated!)
We filter the resulting solutions to remove undissolved lumps and dirt. We lower the nuts tied to a toothpick into salt solutions. It is important to make sure that they do not touch the bottom of the glass. For the growth of crystals, we will select the nuts and tie them to the threads.
In a glass of salt, individual crystals appeared on the nut In a glass of vitriol, a more significant growth of crystals
On a nut with a salt crystal, a slight increase in the number of crystals. The copper sulphate crystal has significantly increased in size
The second failure I tried to separate a few crystals of salt from the nut with tweezers. They dried up very quickly. A few days later under the action environment the crystals are broken. Thus, I realized that the crystals must be protected from environmental influences.
These salt crystals grew on a nut after 14 days And such a handsome man grew in 14 days from blue vitriol
The crystal of copper sulphate was covered with a colorless varnish. Now it is well protected. Conclusions: 1. The crystal grows due to the growth of matter from aqueous solution salt. 2. Crystals of various substances have different shapes (salt has small crystals, a copper sulfate crystal has large faces). 3. Crystals grow at different rates: under the same conditions, a salt crystal grows at a slower rate than a copper sulfate crystal. 4. The crystal needs to be fed periodically, i.e. change the saturated salt solution.
I also learned the safety rules when working with chemicals.
1 slide
Growing crystals at home Author: Daniel Komarnitsky, 4th grade student Supervisor: Romanova L.V. primary school teacher in Gadzhiyevo, 2012-2013 Municipal budgetary educational institution"Basic comprehensive school No. 279 named after the Hero of the Soviet Union, Rear Admiral Lunin N.A. "
2 slide
The goal is to learn how to grow crystals of salt, copper sulfate, potassium aluminum sulfate at home Hypothesis We assume that crystals of salt, copper sulfate, potassium aluminum sulfate can be obtained in a home laboratory. By changing the crystallization conditions, crystals of various shapes and colors can be obtained.
3 slide
Tasks to study the literature on crystals; grow crystals: a) copper sulphate; b) table salt; c) potassium aluminum sulfate. consider methods of staining crystals; analyze the results. Activity methods; research; observations.
4 slide
Security measures: Carry out experiments under the supervision of adults; Put on protective goggles; Always hold containers with hot contents so that the opening is not directed towards yourself or other people. Wash your hands at the end of the experiments. Avoid contact with substances inside and in the eyes. Crystal growing experiments
5 slide
What we need To conduct our experiments, we purchased blue vitriol from a hardware store. In the grocery store, we bought edible table salt, rock salt. In the children's store of young chemists, we bought a set of "Crystal Growing" KOSMOS.
6 slide
Growing a crystal of copper sulphate To prepare the solution, I used hot (80 C) water and copper sulphate. I poured blue vitriol into the water until it stopped dissolving. When I noticed that the crystals no longer dissolve, I placed a pencil with a thread on the glass, lowered the "seed" - a crystal of copper sulfate so that it sank into the solution, but did not touch the bottom.
7 slide
Growing a crystal of copper sulphate In the second jar with a similar solution, I added red food coloring. The experiment has begun.
8 slide
9 slide
Conclusion 1 in 25 days, I managed to grow crystals of copper sulfate measuring 5.3-8.1 cm and 2.6-6 cm; crystals are diamond-shaped;
10 slide
Conclusion 2 when red food coloring is added to the solution, the crystal is colored. It changes color from blue to dark blue, but remains transparent.
11 slide
Growing Salt Crystals First, prepare as much concentrated salt solution as possible. By adding salt to a glass of water, until the next portion of salt ceases to dissolve when stirred. After that, slightly heat the mixture to achieve complete dissolution of the salt.
12 slide
Growing salt crystals In the second jar with the same concentrated salt solution, red food coloring was added.
13 slide
14 slide
Conclusion 3 in 25 days, I grew salt crystals 1.5-10 cm in size and 0.7-4 cm salt crystals of white color, cubic shape.
15 slide
Conclusion 4 when staining salt crystals with red food coloring, the crystals change their color from white to pale pink (the saturation of the colored crystal depends on the amount of food coloring added).
16 slide
Growing crystals of potassium aluminum sulfate Take a jar, measure about 70 ml. water, add potassium aluminum sulfate powder (alum) and mix. Pour water into a saucepan, about 2 cm. and bring to a boil. Put a jar of alum in a saucepan and stir with a stick until completely dissolved.
17 slide
Growing Crystals of Potassium Aluminum Sulfate In a second container with a similar solution, once the alum had dissolved, I added red food coloring.
18 slide
Growing crystals of potassium aluminum sulfate While the solution is cooling, I tied a “seed” to the thread (it was in the “Crystal Growing” kit). I lowered it into the solution, so that the “seed” did not touch the bottom. I put the jar in a place where there are no drafts, vibrations and strong light.
19 slide
20 slide
Conclusion 5 In 39 days I was able to grow crystals of potassium aluminum sulfate. The first size is 1.7 by 1.5 cm and the second is 2 cm 3 mm. crystals have the shape of a star-shaped octahedron (polyhedron).