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
bija089 [108]
3 years ago
8

Materials chalk calcium hydroxide filter paper phenolphthalein heat source two Pyrex beakers Directions Crush some classroom cha

lk (a mixture of limestone and gypsum) finely. Mix chalk into water in a beaker. Pour the mixture through filter paper. The water appears to be "pure." Boil the water or let it evaporate away. What is left? Water also dissolves and transports minerals. In a beaker, mix calcium hydroxide and water. Filter until clear. Fill another container with water. Obtain some phenolphthalein solution and add a few drops to a glass of "pure" water. Add a few drops to the water mixed with calcium hydroxide. Give the results Explain the results.
Biology
1 answer:
Sladkaya [172]3 years ago
5 0
Phemolphthalein changes colour.(i forgot from which to which) This is because calcium hydrroxide is basic.
You might be interested in
What would earth be like without the greenhouse effect?
schepotkina [342]
Freezing. The greenhouse effect is the way how earth is kept warm , as the heat radiation is trapped through the gasses ( gasses reflect the radiation back to earth) without the green house effect, the earth I assume would be all "iced up"and " bare and bold" up, and life (as we know it ) would not survive ( some others forms of life may take place but we never know...)

Personal opinion , free to accept other ideas .
4 0
3 years ago
What is scientific method?
labwork [276]

Answer:

C

Explanation:

5 0
3 years ago
What is the primary distinction of being an animal?
Nezavi [6.7K]
I believe the answer is B.
6 0
3 years ago
When she missed her morning bus ride to work, shelly's blood pressure rose and she experienced a throbbing headache. her physica
Ira Lisetskai [31]
Hello, when Shelly's blood pressure rose her physical responses to missing the bus were --stress reactions.
Please click the thanks button and brainiest to help me stay on here thanks.
4 0
3 years ago
In a particular plant, white fruit color is dominant over yellow. If two white-fruited individuals with genotypes are unknown ar
nydimaria [60]

The probability of obtaining a yellow-fruited plant from the cross is ¼ or 25%.

<h3>WHAT IS A HETEROZYGOUS CROSS</h3>

A heterozygous cross is a cross between two individuals that are heterozygous for two genes.

According to this question, white (W) fruit color is dominant over yellow (w). If two white-fruited individuals with genotypes that are unknown are crossed i.e. Ww × Ww.

The offsprings of this cross are as follows:

  • WW
  • Ww
  • Ww
  • ww

Therefore, the probability of obtaining a yellow-fruited plant from the cross is ¼ or 25%.

Learn more about heterozygous cross at: brainly.com/question/14109187

3 0
2 years ago
Other questions:
  • Identify the three main stages of translation
    12·2 answers
  • People who solve a scientific knowledge to solve a practical problems are producing
    9·1 answer
  • Which group of organisms contains chlorophyll and other pigments that enable them to harvest and use the energy of sunlight?
    7·1 answer
  • Is coronary circulation the same as pulmonary circulation?
    13·1 answer
  • Organisms closely related have less DNA in common?
    9·2 answers
  • What was the purpose of the Declaration
    8·1 answer
  • Lysozyme advantages:
    10·2 answers
  • Storage sites for nuclear wastes:
    13·1 answer
  • Why does secondary session occur faster them primary secession
    14·1 answer
  • E or False: The use of fossil fuels has contributed to more carbon released in the
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!