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Showing posts with label testing. Show all posts
Showing posts with label testing. Show all posts

Wednesday, November 3, 2021

tasting

 today we learned about taste and how it works.

first i will tell you four different tastes

sweet: candy,apples,banana

sour: tamarind,lemon,lime

bitter;grape fruit,dark chocolate,black pepper

salty: pretzels ,fries ,meat

experiment: blind taste testing

equipment

1.samples 1-9

2.blindfold glasses

3.recording chart

4. ice cream stick taster

method

1. get safety glasses and make a blindfold.

2.set up your chart and make sure that the person you are working with knows where to record your responses.

3.using an ice-cream stick you will dip it into the sample.One the sample is on the stick you will taste it and tell your partner your response.

4.there will be 2 answers

5.at taste test one you need to hold your nose

answer 1. is it sweet, sour, salty, bitter. record it.

answer 2. what do you think it is. record it.

6.repeat this for the next samples but you will only need to use your ice-cream stick taster for samples 1-4.

Thursday, September 23, 2021

Neutralised

today we are testing acids again.

equipment

pipettes

test tube

test tube racks

boiling tubes

water

steps

1.Take a test tube rack with 1 boiling tube at each end of the rack and 4 test tube

2.half/quarter fill the boiling tube at one end with sodium hydroxide

3.half/quarter fill the boiling tube at one end with hydrochloric acid

4.fill each test tube with 5 drops of Universal indicator

5.Using the pipettes you will add drops of the acid or alkaline to the test tube to make colours of red,orange,yellow,green,blue,violet

6.don't mix the pipettesHow to Test pH with Red Cabbage - Soap Queen