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
oee [108]
3 years ago
9

Iki indicator tests for the presence of which substance? benedict's reagent tests for the presence of which substance?

Chemistry
1 answer:
joja [24]3 years ago
8 0
<span>IKI solution looks for starches, while Benedict's looks for sugars. IKI is iodine potassium iodide, which turns a dark blue when in the presence of amylase. Benedict's reagent is often used to look for reducing sugars, such as glucose, and turns colors ranging from a light green to a dark-red or brown with a cuprous precipitate in the presence of higher quantities of sugars in the tested solution.</span>
You might be interested in
Identify the element using the Bohr model below.​
Maurinko [17]
Nitrogen I believe . I need 20 characters.
3 0
2 years ago
Joan’s initial nickel (II) chloride sample was green and weighed 4.3872 g. After the dehydration reaction and removal of excess
ANEK [815]

Answer:

a) yes, it was an hydrate

b) the number of waters of hydration, x = 6

Explanation:

a) yes it was an hydrate because the mass decreased after the process of dehydration which means removal of water thus some water molecules were present in the sample.

b) NiCl2. xH2O

mass if dehydrated NiCl2 = 2.3921 grams

mass of water in the hydrated sample = mass of hydrated - mass of dehydrated = 4.3872 - 2.3921 = 1.9951 g which represent the mass of water that was present in the hydrated sample.

NiCl2.xH2O

mole of dehydrated NiCl2 = m/Mm = 2.3921/129.5994 = 0.01846 mole

mole of water = m/Mm = 1.9951/18.02 = 0.11072 mole

Divide both by the smallest number of mole (which is for NiCl2) to find the coefficient of each

for NiCl2 = 0.01846/0.01846 = 1

for H2O = 0.11072/0.01846 = 5.9976 = 6

thus the hydrated sample was NiCl2. 6H2O

4 0
3 years ago
Which of the following is a pure substance
sergij07 [2.7K]
What is the following
8 0
3 years ago
I build a fire and burn 3 logs. Apply the Law of Conservation of Matter
photoshop1234 [79]
Capture all of the smoke and weight it. it will weigh exactly the same before and after you burn it but will just be CO2 and H2O gas.
7 0
3 years ago
How can a flame test identify an unknown element?
Ilya [14]

Answer:

the answer for this question is the option D

6 0
3 years ago
Other questions:
  • Based of the chemical reaction below, if you have 3.56x10^23 molecules of C3H8, how many liters of CO2 gas will be produced at S
    9·1 answer
  • 1. At STP, how many liters of oxygen are required to react completely with 3.6 liters of hydrogen to form water? 2H2(g)+O2(g) -&
    5·1 answer
  • Explain what states are changing in these examples
    14·1 answer
  • What is the most poisonous animal?
    9·1 answer
  • State 2 ways in which adaptation help animals?
    9·1 answer
  • The pencil is material or mixture ?please help ​
    13·1 answer
  • An archaeologist finds 14C in a sample of material to be decaying at 20 Geiger Counter clicks per second. A modern equivalent sa
    7·1 answer
  • In which of the following statements best describes the sun's
    10·2 answers
  • Convert 355 km/s into m/ns.
    7·2 answers
  • (Atomic masses used are C = 12.0 g mol–1, O = 16.0 g mol–1, H = 1.01 g mol–1, Cu = 63.5 g mol–1,)
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!