Which acid causes the sourness of green apples?

citric acid
malic acid
lactic acid
formic acid
Malic acid is more sour than citric acid, and is the source of extreme tartness in so-­called extreme candy. Malic acid occurs nat­u­ral­ly in all fruits and many veg­eta­bles.

Answers distribution

citric acid
malic acid
lactic acid
formic acid
answers
flagNorway
10%
67%
10%
12%
49
flagBelgium
19%
66%
14%
0%
21
flagGermany
16%
65%
9%
7%
232
flagPoland
20%
64%
6%
7%
22325
flagSpain
18%
62%
3%
11%
27
flagItaly
19%
61%
9%
9%
42
flagthe United Kingdom
27%
56%
7%
7%
575
flagIndia
27%
54%
8%
8%
341
flagFrance
23%
54%
7%
14%
64
flagthe Netherlands
26%
53%
7%
11%
67
flagRepublic of Ireland
23%
53%
9%
14%
64
flagUkraine
28%
52%
4%
14%
21
flagUnknown
28%
51%
6%
12%
932
flagSweden
42%
42%
7%
7%
28
flagthe United States
41%
41%
7%
7%
634
flagCanada
42%
40%
5%
9%
54
flagAustralia
43%
37%
12%
6%
48
flagPakistan
51%
35%
10%
2%
37
flagMalaysia
46%
35%
7%
10%
28
flagthe Philippines
48%
25%
20%
5%
35

Gender

men51%
women55%
citric acid
27%
25%
malic acid
51%
55%
lactic acid
8%
9%
formic acid
12%
8%

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Which acid causes the sourness of green apples?
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Author: Kasia
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