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
the atomical plane denoting the vertical field running through the body from the front to the back dividing the body into the ri
icang [17]

Answer:

midsagittal.........

5 0
3 years ago
There are three main states of matter: liquid, solid, and gas. All have different physical
Natasha2012 [34]

Answer:

A. It has its own shape

8 0
3 years ago
Read 2 more answers
It appears that the same lifestyle factors that contribute to the development of _____ also increase the risk for vascular demen
STALIN [3.7K]
It appears that the same lifestyle factors that contribute to the development of Cerebrovascular disease also increase the risk for vascular dementia. Vascular dementia describes the problems with reasoning, planning, judgement, memory and other thought processes caused by brain damage from impaired blood flow in the brain. 
5 0
3 years ago
This is the process in which two chromosomes exchange DNA during prophase of meiosis.
Sergio039 [100]
Crossing over between two chromosomes
8 0
3 years ago
Read 2 more answers
A similarity between the nervous system and the hormone secreting system in humans is that they both...
emmainna [20.7K]
A similarity between the nervous system and the hormone secreting system in humans is that they both <span>help to maintain homeostasis.

Homeostasis is <span>the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.</span> 
</span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • Why would a doctor expect to see low levels of TSH in the blood of a patient with hyperthyroidism
    6·1 answer
  • how does science affect your daily life.pick 3 inventions to support this. what would happen if we didn't have science use those
    10·2 answers
  • The first strands of DNA were observed through which microscope? tunneling microscope simple microscope compound light microscop
    11·2 answers
  • Which sectional planes of the body could show parts of both lungs and the heart?
    15·1 answer
  • In coronary angiography, a clinically significant blockage in a major coronary artery is considered to be an obstruction of at l
    15·1 answer
  • 8. Two rabbits are bred together. One is heterozygous for agouti coat
    14·1 answer
  • Which statement best explains how the genetic code is universal? * The shape of a DNA molecule is the same in different species.
    5·1 answer
  • Which is one place that glaciers are found?
    12·2 answers
  • Drinking too much water during exercise can cause a condition in which the concentration of sodium in the blood is lower than no
    14·1 answer
  • Which group of plants lacks true roots, stems, and leaves?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!